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Author SHA1 Message Date
9dda4bebc5 Make measure string go brrrrrrr
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2024-07-31 12:01:57 -04:00
a5bfb4972a Fill quad
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2024-07-30 23:37:47 -04:00
4348f2708a Gradient triangle
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2024-07-30 15:49:13 -04:00
32dd2b54ca incorporate builddeps.reci
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2024-07-29 19:30:23 -04:00
e8b601aa25 install build deps reci script
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2024-07-29 19:29:11 -04:00
d5fd3e1a49 reci lua edition
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2024-07-29 19:24:55 -04:00
f593a0beac Cleanup & Update ReTexture.
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2024-07-19 17:16:38 -04:00
0b7af6fd31 Cleanup
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2024-07-19 01:34:43 -04:00
eca4309e85 DrawSprite
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2024-07-18 22:24:19 -04:00
4be97f52d9 Minor documentation additions.
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2024-07-18 14:51:19 -04:00
613a13618c Merge branch 'master' of https://git.redacted.cc/Josh/JGL
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2024-07-18 14:49:19 -04:00
4150c93c85 Make it like, go faster. 2024-07-18 14:49:15 -04:00
9dee59fd45 Merge remote-tracking branch 'origin/master'
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2024-07-18 14:04:16 -04:00
b6b2ca1bfe Remove old LoadFont function. 2024-07-18 14:04:11 -04:00
4eca3311c8 Fix text being shifted up by it's own height.
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2024-07-18 14:01:58 -04:00
54711355c4 Merge branch 'master' of https://git.redacted.cc/Josh/JGL
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2024-07-18 14:01:14 -04:00
8bddf3e0a7 Update JGL.cpp
Fix glBlend always being enabled because I'm an idiot
2024-07-18 14:00:57 -04:00
26d17dae38 Move glPixelStore call inside of InitTextEngine so users don't need to call it. Also adjusted Color3 and Color4, more work coming soon.
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2024-07-18 13:45:11 -04:00
4ff8d8ff07 Update Font.cpp
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fix memleak
2024-07-17 16:52:31 -04:00
162732e4b7 Fix Dereference
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2024-07-17 16:11:36 -04:00
289157ab8a Fiddle with README some
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2024-07-17 15:54:39 -04:00
3a658b1096 Testing MeasureString with underlaid box. But it appears to be offset by half-height?
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2024-07-17 15:19:38 -04:00
480502f89e Implement Font::MeasureString (TODO: double check!!)
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2024-07-17 14:59:34 -04:00
d28f680cd0 Half-baked Font class implementation
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2024-07-16 14:54:47 -04:00
2d1e42c23b Half-ass Font class implementation
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2024-07-16 14:39:44 -04:00
abd691b648 uhhhhhhhhhh yeeeeeeea
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2024-07-16 14:19:39 -04:00
e261b610c2 Update TextRendering.cpp
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Reset the Texture after drawing text.
2024-07-15 11:50:27 -04:00
8625c52ee9 Implement optimizations for 2D text rendering (#23)
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The following patches are included:

## J2D: Rewrite text rendering

This patch rewrites text rendering for `J2D::DrawString` to now construct
a texture atlas for all ASCII-range glyphs in the FT font face, instead
of constructing a texture for every glyph.

This improves text rendering performance for several reasons:

1. Binding textures is relatively expensive as the GPU is required to do
   a context switch for internal data like texture parameters, and also
   cannot optimize for accesses to the same texture across draw calls.
   This patch removes the need to call `glBindTexture` more than once per
   call to `J2D::DrawString`.
2. As a consequence of the above, all glyphs for a given string can now
   be rendered in a single call to `glDrawArrays`. This is done by storing
   the cached texture coordinates on `CachedGlyph` and constructing a full
   array of vertices and texture coordinates for the entire string at
   once, resulting in only /one/ set of client-to-device attribute
   uploads and only one draw call, instead of being required to upload
   attribute data for each glyph separately.

## FontCache: Use map for efficient glyph lookup

This patch updates `CachedFont` to now use an `std::map` for cached glyphs,
instead of an `std::vector`. `std::map` allows O(log n) lookup, whereas
`std::vector` only allows O(n) lookup.

Note: `std::unordered_map` technically has better lookup complexity here,
with amortized O(1) lookup. However, hashmaps have a higher inherent
overhead than red-black trees so this would only be viable when going
above around 1000 entries, which should never happen here for ASCII
glyphs.

Co-authored-by: Ori Sky Farrell <ori.sky.farrell+git@gmail.com>
Reviewed-on: #23
Co-authored-by: ori_sky <redacted@ori.mx>
Co-committed-by: ori_sky <redacted@ori.mx>
2024-07-15 11:38:20 -04:00
74a4705e44 Fix windows being picky.
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2024-07-12 13:14:24 -04:00
ae327b96a5 Cleanup
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2024-07-12 01:47:49 -04:00
19 changed files with 774 additions and 274 deletions

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@@ -17,8 +17,6 @@ jobs:
- run: echo "The ${{ gitea.repository }} repository has been cloned to the runner."
- run: echo "The workflow is now ready to run your tests on the runner."
- run: echo "Install toolchain and run ReCI build test"
- run: apt-get update && apt-get install -y git && git clone $RECI_GIT $RECI
- run: bash $RECI/scripts/setup_build_tools.sh
- run: bash reci/scripts/install_build_dependencies.sh
- run: bash $RECI/scripts/run_buildtest.sh ${{ gitea.repository }}
- run: apt-get update && apt-get install -y lua5.3 git && git clone $RECI_GIT $RECI
- run: lua $RECI/reci.lua -f $RECI/scripts/buildtools.reci -f reci/scripts/builddeps.reci -f $RECI/scripts/buildtest.reci
- run: echo "This job's status is ${{ job.status }}."

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@@ -38,6 +38,12 @@ CPMAddPackage(
NAME Event
URL https://git.redacted.cc/josh/Event/archive/Release-6.zip
)
CPMAddPackage(
NAME ReTexture
URL https://git.redacted.cc/Redacted/ReTexture/archive/Release-1.zip
)
if (WIN32)
#CPMAddPackage(
#NAME harfbuzz
@@ -68,6 +74,9 @@ endif()
set_target_properties(JGL PROPERTIES LINKER_LANGUAGE CXX)
#Don't expose this one because it's only to be used in the demo program.
include_directories(${ReTexture_SOURCE_DIR}/include)
target_include_directories(JGL PUBLIC
${PROJECT_SOURCE_DIR}/include
${OPENGL_INCLUDE_DIRS}
@@ -93,4 +102,4 @@ if (WIN32)
target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} J3ML ReWindowLibrary glad jlog Event)
endif()
target_link_libraries(JGL_Demo PUBLIC JGL)
target_link_libraries(JGL_Demo PUBLIC JGL ReTexture)

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@@ -4,23 +4,39 @@ Yet Another C++ Rendering Toolkit
![Static Badge](https://img.shields.io/badge/Lit-Based-%20)
## Goals
* Provide single-function-calls to render various graphics primitives in 2D and 3D.
* Integrated directly with our other toolkits (ReWindow, J3ML)
* Quick Rendering of Debug Text, Geometric Widgets, Textures, and so forth.
## Non-Goals
* Full Rendering Engine
* OpenGL/Vulkan Wrapper
* Asset Loading & Management
## Features
* Modern C++ (20)
* Little-to-no overhead
* No hand-holding
* No-frills, straight up just renders shapes and text.
* Provides single-function-calls to render various graphics primitives in 2D and 3D.
* Integrates directly with our other toolkits (ReWindow, J3ML)
* Quick Rendering of Debug Text, Geometric Widgets, Textures, and so forth.
* Little-to-no overhead.
* Integrates right into an existing OpenGL rendering system.
* High-performance text rendering.
## API Overview
### J2D
* DrawPixel
* DrawLine / DrawGradientLine
* DrawSprite
* OutlineRect / FillRect / FillGradientRect / FillRoundedRect
* OutlineCircle / FillCircle
* OutlineTriangle / FillTriangle
* DrawString
### J3D
* DrawLine
* DrawString
* DrawMatrixGizmo (WIP)
* DrawAxisAngleGizmo (WIP)
* DrawQuaternionGizmo (WIP)
### Types
* Font
* Sprite
* Color4/Color3
* Gradient
## Usage

BIN
assets/sprites/Re3D.png Normal file

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After

Width:  |  Height:  |  Size: 8.0 KiB

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@@ -5,19 +5,35 @@
namespace JGL
{
using namespace J3ML;
struct Color3 {
/// Represents a 3-channel color value, with Red, Green and Blue components.
class Color3 {
public:
u8 r;
u8 g;
u8 b;
Color3 Lerp(const Color3& rhs, float alpha) const;
Color3(u8 R, u8 G, u8 B) : r(R), g(G), b(B) {}
u8 RedChannel () const { return r; }
u8 GreenChannel() const { return g; }
u8 BlueChannel () const { return b; }
float RedChannelNormalized () const { return static_cast<float>(r) / 255.f;}
float BlueChannelNormalized() const { return static_cast<float>(b) / 255.f;}
float GreenChannelNormalized() const { return static_cast<float>(g) / 255.f;}
public:
/// Explicitly constructs a Color3 from the given Red, Green, and Blue values.
Color3(u8 R, u8 G, u8 B);
/// Returns a Color3 parsed from the given hexadecimal string.
static Color3 FromHex(const std::string& hexCode);
public:
/// Returns a Color3 that is somewhere in-between this and the given Color3, determined by the alpha [0-1].
Color3 Lerp(const Color3& rhs, float alpha) const;
/// Returns the red channel [0-255].
u8 RedChannel () const;
/// Returns the green channel [0-255].
u8 GreenChannel() const;
/// Returns the blue channel [0-255].
u8 BlueChannel () const;
/// Returns the red channel normalized from [0-255] to [0-1].
float RedChannelNormalized () const;
/// Returns the green channel normalized from [0-255] to [0-1].
float GreenChannelNormalized() const;
/// Returns the blue channel normalized from [0-255] to [0-1].
float BlueChannelNormalized() const;
};

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@@ -4,14 +4,29 @@
namespace JGL
{
/// Represents a 4-channel color value, with Red, Green, Blue, and Alpha components.
class Color4 {
public:
explicit Color4(const Color3& color3, unsigned int alpha) {r = color3.r; g = color3.g; b = color3.b; a = alpha;}
Color4(int red, int green, int blue, int alpha = 127) : r(red), g(green), b(blue), a(alpha) {}
static Color4 FromColor3(const Color3& color3, unsigned int alpha = 127) {return Color4(color3, alpha);}
int r;
int g;
int b;
int a;
u8 r;
u8 g;
u8 b;
u8 a;
public:
explicit Color4(const Color3& color3, u8 alpha = 255);
Color4(u8 red, u8 green, u8 blue, u8 alpha = 255);
static Color4 FromColor3(const Color3& color3, u8 alpha = 255);
static Color4 FromHex(const std::string& hexCode, u8 alpha = 255);
public:
u8 RedChannel() const;
u8 GreenChannel() const;
u8 BlueChannel() const;
u8 AlphaChannel() const;
float RedChannelNormalized() const;
float GreenChannelNormalized() const;
float BlueChannelNormalized() const;
float AlphaChannelNormalized() const;
};
}

40
include/JGL/Font.h Normal file
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@@ -0,0 +1,40 @@
#pragma once
#include <vector>
#include <filesystem>
#include <J3ML/LinearAlgebra.h>
#include <filesystem>
#include <iostream>
/// Defines external C references to FreeType Data Structures
extern "C" typedef struct FT_FaceRec_* FT_Face;
extern "C" typedef struct FT_LibraryRec_* FT_Library;
namespace JGL
{
/// Initializes FreeType engine. Remember to call this during program initialization.
bool InitTextEngine();
/// A Font class implementation.
/// Wraps the font's FreeType asset handle and provides helper functions.
class Font {
public:
/// Default constructor does not initialize any members
Font() = default;
Font(const std::filesystem::path& path);
/// Destructor handles freeing of the underlying asset handle.
~Font();
static Font LoadTTF(const std::filesystem::path& filepath);
static std::vector<Font> GetLoadedFonts();
/// Returns the bounding-box the given string would occupy at the given point-size, assuming normal (1) scaling.
/// @param text The string to measure.
/// @param ptSize The font size at which to measure.
/// @return The size-in-pixels that would contain the entire text.
Vector2 MeasureString(const std::string& text, unsigned int ptSize);
public:
int index = 0;
FT_Face face;
};
}

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@@ -1,53 +1,67 @@
#pragma once
#include <array>
#include <map>
#include <vector>
#include <glad/glad.h>
/// TODO: FontCache mechanism works amazing, but makes no fucking sense
/// Let's document and reorganize it to be a little nicer on the mental :)
namespace JGL {
class CachedGlyph;
class CachedFont;
class FontCache;
}
/// Represents a single font-character "glyph", that has been cached in-memory for fast retrieval.
class JGL::CachedGlyph {
private:
GLuint texture = 0;
char character;
std::array<GLfloat, 12> texcoords;
public:
int x2offset = 0, y2offset = 0, w = 0, h = 0;
float advanceX = 0, advanceY = 0;
//CachedGlyph(GLuint texture_id, char c);
CachedGlyph(GLuint texture_id, char c, float x2o, float y2o, float w, float h, float advX, float advY);
CachedGlyph(char c, std::array<GLfloat, 12> texcoords, float x2o, float y2o, float w, float h, float advX, float advY);
char getCharacter();
const GLuint* getTexture();
const std::array<GLfloat, 12> getTexCoords() const;
};
/// Represents a Font object as it exists in the font-cache.
class JGL::CachedFont {
private:
std::vector<CachedGlyph*> glyphs{};
std::map<char, CachedGlyph*> glyphs;
GLuint texture = 0;
GLsizei texture_width = 0, texture_height = 0;
unsigned int font_size = 0;
unsigned int font_index = 0;
public:
void appendGlyph(CachedGlyph* glyph);
void eraseGlyph(CachedGlyph* glyph);
void eraseGlyph(char c);
void eraseGlyph(GLuint texture_id);
unsigned int getFontSize();
unsigned int getFontIndex();
CachedGlyph* getGlyph(char c);
std::vector<CachedGlyph*>* getGlyphs();
CachedFont(unsigned int font_size, unsigned int font_index);
std::map<char, CachedGlyph*> getGlyphs();
const GLuint* getTexture();
GLsizei getTextureWidth() const;
GLsizei getTextureHeight() const;
CachedFont(GLuint texture_id, GLsizei texture_width, GLsizei texture_height, unsigned int font_size, unsigned int font_index);
};
class JGL::FontCache {
private:
std::vector<CachedFont*> cachedFonts = {};
public:
std::vector<CachedFont*>* getFonts();
std::vector<CachedFont*> getFonts();
CachedFont* getFont(unsigned int font_size, unsigned int font_index);
void appendFont(CachedFont* font);
void newFont(unsigned int font_size, unsigned int font_index);
void newFont(GLuint texture_id, GLsizei texture_width, GLsizei texture_height, unsigned int font_size, unsigned int font_index);
void eraseFont(CachedFont* font);
void purgeCache();
};
};
namespace JGL {
inline FontCache fontCache;
}

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@@ -1,12 +0,0 @@
#pragma once
#include <J3ML/J3ML.h>
namespace JGL {
enum class Gradient : u8 {
Vertical = 0,
Horizontal = 1,
DiagonalTopLeft = 2,
DiagonalBottomLeft = 3
};
}

View File

@@ -1,13 +1,23 @@
//
// Created by dawsh on 1/17/24.
//
/// Josh's Graphics Library
/// A C++20 Library for rendering 2D and 3D primitives in an OpenGL context.
/// Developed and Maintained by Josh O'Leary @ Redacted Software.
/// Special Thanks to William Tomasine II and Maxine Hayes.
/// (c) 2024 Redacted Software
/// This work is dedicated to the public domain.
/// @file JGL.h
/// @desc All JGL usable functions are defined here. This is the public API.
/// @edit 2024-07-16
#pragma once
#include <string>
#include <iostream>
#include <JGL/Color4.h>
#include <JGL/Gradient.h>
#include <JGL/enums.h>
#include <JGL/FontCache.h>
#include <JGL/Font.h>
#include <J3ML/LinearAlgebra.h>
#include <J3ML/LinearAlgebra/Vector2.h>
#include <J3ML/LinearAlgebra/Vector3.h>
@@ -18,19 +28,10 @@
// OpenGL Wrapper for rendering 2D graphics primitives in both a 2D and 3D context
namespace JGL {
using J3ML::LinearAlgebra::Vector2;
using J3ML::LinearAlgebra::Vector3;
using J3ML::LinearAlgebra::Matrix3x3;
using J3ML::LinearAlgebra::Matrix4x4;
using J3ML::LinearAlgebra::AxisAngle;
using J3ML::LinearAlgebra::Quaternion;
using J3ML::Geometry::Sphere;
using J3ML::Geometry::OBB;
using J3ML::Geometry::Capsule;
using J3ML::Geometry::TriangleMesh;
using J3ML::Geometry::Plane;
using namespace J3ML::LinearAlgebra;
using namespace J3ML::Geometry;
/// TODO:
struct HSV {
float hue;
float saturation;
@@ -51,11 +52,12 @@ namespace JGL {
Vector3 C;
};
bool Update(const Vector2& window_size);
bool InitTextEngine();
int LoadFont(const std::string& font_path);
void Update(const Vector2& window_size);
//bool InitTextEngine();
Font LoadFont(const std::string& font_path); // TODO: Fully deprecate
void PurgeFontCache();
void UnloadFont(int font_index);
void SetActiveFont(const Font& font); // TODO: Implement
// TODO: implement correct coloring
/// Drawing functions for primitive 2D Shapes.
@@ -85,7 +87,7 @@ namespace JGL {
/// @param B The end point of the line segment.
/// @param thickness The width at which to render the line.
void DrawLine(const Color3& color, const Vector2& A, const Vector2& B, float thickness = 1);
void DrawLine(const Color3 &color, float x, float y, float w, float h, float thickness = 1);
void DrawLine(const Color3& color, float x, float y, float w, float h, float thickness = 1);
void DrawLine(const Color4& color, const Vector2& A, const Vector2& B, float thickness = 1);
void DrawLine(const Color4& color, float x1, float y1, float x2, float y2, float thickness = 1);
@@ -99,16 +101,30 @@ namespace JGL {
void OutlineRect(const Color4& color, const Vector2& pos, const Vector2& size, float thickness = 1);
void OutlineRect(const Color3& color, const Vector2& pos, const Vector2& size, float thickness = 1);
///Draws a sprite to the screen.
void DrawSprite(GLuint texture, const Vector2& pos, const Vector2& size, u8 opacity = 255, Inversion::Inversion inversion = Inversion::None);
void DrawSprite(GLuint texture, float x, float y, float w, float h, u8 opacity = 255, Inversion::Inversion inversion = Inversion::None);
///Draws a non axis-aligned fill rect to the screen.
///The order of the vertices must be such that if you were to connect them you'd never go diagonally across the quad.
void FillQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4);
void FillQuad(const Color3& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4);
///Draws a non axis-aligned outline rect to the screen.
///The order of the vertices must be such that if you were to connect them you'd never go diagonally across the quad.
void OutlineQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness = 1);
void OutlineQuad(const Color3& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness = 1);
/// Draws a filled rectangle on the screen.
void FillRect(const Color4& color, const Vector2& pos, const Vector2& size);
void FillRect(const Color3& color, const Vector2& pos, const Vector2& size);
/// Draws a filled rectangle where the color transitions across it.
void FillGradientRect(const Color4& color1, const Color4& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size);
void FillGradientRect(const Color3& color1, const Color3& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size);
void FillGradientRect(const Color4& color1, const Color4& color2, const Gradient::Gradient& gradient, const Vector2& pos, const Vector2& size);
void FillGradientRect(const Color3& color1, const Color3& color2, const Gradient::Gradient& gradient, const Vector2& pos, const Vector2& size);
/// Draws a filled rectangle with rounded corners on the screen.
void FillRoundedRect(const Color4 &color, const Vector2 &pos, const Vector2 &size, float radius = 5, unsigned int subdivisions = 8);
void FillRoundedRect(const Color4& color, const Vector2 &pos, const Vector2 &size, float radius = 5, unsigned int subdivisions = 8);
void FillRoundedRect(const Color3& color, const Vector2& pos, const Vector2& size, float radius = 5, unsigned int subdivisions = 8);
/// Draws an outline of a circle on the screen.
@@ -125,17 +141,22 @@ namespace JGL {
// TODO: Implement an overload that simply takes 3 Vector3's
/// Draws a filled triangle on the screen.
void FillTriangle(const Color4& color, const Triangle2D &tri);
void FillTriangle(const Color4& color, const Triangle2D& tri);
void FillTriangle(const Color3& color, const Triangle2D& tri);
/// Draws a triangle where each corner is defined by a given color, Smoothly transitioning between them.
void FillGradientTriangle(const Color4& a_color, const Color4& b_color, const Color4& c_color, const Triangle2D& tri);
void FillGradientTriangle(const Color3& a_color, const Color3& b_color, const Color3& c_color, const Triangle2D& tri);
// TODO: Implement an overload that simply takes 3 Vector3's
/// Draws a text string on the screen with a given point-size and font.
void DrawString(const Color3& color, std::string text, float x, float y, float scale, u32 size, unsigned int font_index);
void DrawString(const Color4& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font);
void DrawString(const Color3& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font);
// TODO: Implement the following:
void FillTexturedTriangle();
void FillTexturedPolygon();
void DrawSprite();
void DrawPartialSprite();
void DrawCubicBezierCurve();
void OutlinePolygon (const Color4& color, std::vector<Vector2> points);
@@ -157,7 +178,7 @@ namespace JGL {
void WireframeCapsule(const Color3& color, const Capsule& cap, float thickness = 1);
void FillTriangleMesh(const Color3& color, const TriangleMesh& mesh);
void WireframeTriangleMesh(const Color3& color, const TriangleMesh& mesh, float thickness = 1);
void DrawString(const Color3& color, const std::string& text, const Vector3& pos, const Vector3& angle, float scale, u32 size, unsigned int font_index);
void DrawString(const Color3& color, const std::string& text, const Vector3& pos, const Vector3& angle, float scale, u32 size, const Font& font);
void DrawMatrixGizmo (const Matrix3x3&, const Vector3&);
void DrawMatrixGizmo (const Matrix4x4&);

26
include/JGL/enums.h Normal file
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@@ -0,0 +1,26 @@
#pragma once
namespace JGL::Inversion {
enum Inversion {
None = 0,
Vertical = 1,
Horizontal = 2,
};
inline Inversion operator|(Inversion a, Inversion b) {
return static_cast<Inversion>(static_cast<int>(a) | static_cast<int>(b));
}
}
namespace JGL::Gradient {
enum Gradient {
Vertical = 0,
Horizontal = 1,
DiagonalTopLeft = 2,
DiagonalBottomLeft = 3
};
inline Gradient operator|(Gradient a, Gradient b) {
return static_cast<Gradient>(static_cast<int>(a) | static_cast<int>(b));
}
}

View File

@@ -1,12 +1,18 @@
#include <glad/glad.h>
#include <JGL/JGL.h>
#include <rewindow/types/window.h>
#include <JGL/Colors.h>
#include <J3ML/LinearAlgebra/Vector2.h>
#include <JGL/Font.h>
#include <jlog/jlog.hpp>
#include <ReTexture/Texture.h>
using J3ML::LinearAlgebra::Vector2;
using namespace JGL;
using namespace ReTexture;
Texture* image;
GLuint imageID;
//The Re3D style base projection.
std::vector<GLfloat> perspective(float fov, float aspect, float nearPlane, float farPlane) {
std::vector<float> result(16);
@@ -24,13 +30,13 @@ public:
Vector3 position = {0,0,0};
Vector3 angle = {0,0,0};
std::array<GLfloat, 16> lookAt(const Vector3& eye, const Vector3& center, const Vector3& up) {
std::vector<GLfloat> lookAt(const Vector3& eye, const Vector3& center, const Vector3& up) {
Vector3 f = Vector3::Normalized((center - eye));
Vector3 upN = Vector3::Normalized(up);
Vector3 s = Vector3::Normalized(f.Cross(upN));
Vector3 u = Vector3::Normalized(s.Cross(f));
std::array<GLfloat, 16> result = {
std::vector<GLfloat> result = {
s.x, u.x, -f.x, 0.0f,
s.y, u.y, -f.y, 0.0f,
s.z, u.z, -f.z, 0.0f,
@@ -57,8 +63,8 @@ struct point {
GLfloat t;
};
int FreeSans;
int Jupiteroid;
JGL::Font FreeSans;
JGL::Font Jupiteroid;
class JGLDemoWindow : public ReWindow::RWindow
{
@@ -69,11 +75,11 @@ public:
auto aspect = (float) window_size[0] / (float) window_size[1];
gladLoadGL();
JGL::InitTextEngine();
JGL::Update(getSize());
FreeSans = JGL::LoadFont("assets/fonts/FreeSans.ttf");
Jupiteroid = JGL::LoadFont("assets/fonts/Jupiteroid.ttf");
FreeSans = JGL::Font("assets/fonts/FreeSans.ttf");
Jupiteroid = JGL::Font("assets/fonts/Jupiteroid.ttf");
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMultMatrixf(perspective(75, aspect, 0.001, 100).data());
@@ -84,6 +90,21 @@ public:
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glDepthMask(GL_TRUE);
image = new Texture("assets/sprites/Re3D.png");
glGenTextures(1, &imageID);
glBindTexture(GL_TEXTURE_2D, imageID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
if (image->getTextureFormat() == TextureFormat::RGBA)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image->getWidth(), image->getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixelData.data());
if (image->getTextureFormat() == TextureFormat::RGB)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, image->getWidth(), image->getHeight(), 0, GL_RGB, GL_UNSIGNED_BYTE, image->pixelData.data());
glBindTexture(GL_TEXTURE_2D, 0);
}
Vector3 textAngle = {0,0,0};
@@ -96,6 +117,7 @@ public:
camera->render();
///All 3D elements of the scene and JGL elements *must* be rendered before the 2d stuff.
J3D::Begin();
J3D::DrawLine(JGL::Colors::Red, {-0.33,-0.125,1}, {-1,-0.125,1});
J3D::DrawLine(JGL::Colors::Red, {-0.33,-0.125,1}, {-0.33,0.25,1});
@@ -103,7 +125,9 @@ public:
J3D::End();
J2D::Begin();
J2D::FillQuad(Color4(Colors::Red), {500, 52}, {500, 152}, {600, 152}, {600, 52});
J2D::FillRect(Colors::Blue, {0,52}, {100,100});
J2D::DrawSprite(imageID, {0, 52}, {(float) image->getWidth(), (float) image->getHeight()}, 128);
J2D::FillRect(Color4::FromColor3(Colors::Pinks::HotPink), {68, 120}, {32, 32});
J2D::FillGradientRect(Colors::Red, Colors::Blue, Gradient::DiagonalBottomLeft, {100,52}, {100,100});
J2D::FillRoundedRect(JGL::Colors::Red, {200, 52}, {100, 100}, 8, 8);
@@ -112,20 +136,24 @@ public:
J2D::FillCircle(JGL::Colors::White, {52, 204}, 50, 24);
J2D::OutlineCircle(JGL::Colors::White, {153, 204}, 50, 24);
J2D::FillTriangle(Colors::Red, {{0, 275}, {0, 375}, {100, 375}});
//J2D::FillTriangle(Colors::Red, {{0, 275}, {0, 375}, {100, 375}});
J2D::FillGradientTriangle(Color4(Colors::Red), Color4(Colors::Green), Color4(Colors::Blue), {{0, 275}, {0, 375}, {100, 375}});
J2D::OutlineTriangle(Colors::Blue, {{100, 275}, {0, 275}, {100, 375}});
J2D::DrawGradientLine(JGL::Colors::Red, JGL::Colors::Blue, {105, 375}, {200, 275}, 2);
auto result = Jupiteroid.MeasureString("Jupiteroid Font", 16);
J2D::DrawString(JGL::Colors::Green, "Jupteroid Font", 0.f, 16, 1.f, 16, Jupiteroid);
J2D::DrawString(JGL::Colors::White, "Position: " + std::to_string(camera->position.x) + " " + std::to_string(camera->position.y) + " " + std::to_string(camera->position.z), 0, 33, 1,16, Jupiteroid);
J2D::DrawString(JGL::Colors::White, "ViewAngle: " + std::to_string(camera->angle.x) + " " + std::to_string(camera->angle.y) + " " + std::to_string(camera->angle.z), 0, 50, 1,16, Jupiteroid);
J2D::FillRect(JGL::Colors::Gray, {0, 0}, result);
J2D::DrawString(JGL::Colors::Green, "Jupteroid Font", 0.f, 0, 1.f, 16, Jupiteroid);
J2D::DrawString(JGL::Colors::White, "Position: " + std::to_string(camera->position.x) + " " + std::to_string(camera->position.y) + " " + std::to_string(camera->position.z), 0, 16, 1,16, Jupiteroid);
J2D::DrawString(JGL::Colors::White, "ViewAngle: " + std::to_string(camera->angle.x) + " " + std::to_string(camera->angle.y) + " " + std::to_string(camera->angle.z), 0, 33, 1,16, Jupiteroid);
J2D::End();
}
void OnRefresh(float elapsed) override {
display();
if (glGetError() != GL_NO_ERROR)
exit(1);
int glError = glGetError();
if (glError != GL_NO_ERROR)
std::cout << glError << std::endl;
glSwapBuffers();
}

View File

@@ -0,0 +1 @@
Main:new("Install build dependencies", "apt-get install -yq libgl1-mesa-dev libfreetype-dev")

View File

@@ -6,12 +6,11 @@ char CachedGlyph::getCharacter() {
return character;
}
const GLuint* CachedGlyph::getTexture() {
return &texture;
const std::array<GLfloat, 12> CachedGlyph::getTexCoords() const {
return texcoords;
}
CachedGlyph::CachedGlyph(GLuint texture_id, char c, float x2offset, float y2offset, float w, float h, float advanceX, float advanceY) {
texture = texture_id;
CachedGlyph::CachedGlyph(char c, std::array<GLfloat, 12> texcoords, float x2offset, float y2offset, float w, float h, float advanceX, float advanceY) {
character = c;
this->x2offset = x2offset;
this->y2offset = y2offset;
@@ -19,10 +18,14 @@ CachedGlyph::CachedGlyph(GLuint texture_id, char c, float x2offset, float y2offs
this->h = h;
this->advanceX = advanceX;
this->advanceY = advanceY;
this->texcoords = texcoords;
}
//TODO
//Because most things shown would be english characters. We can cut down on the iteration time significantly
//by putting each english character at the beginning of the list in order of how often they usually occur in text.
void JGL::CachedFont::appendGlyph(JGL::CachedGlyph* glyph) {
glyphs.push_back(glyph);
glyphs.emplace(glyph->getCharacter(), glyph);
}
unsigned int JGL::CachedFont::getFontSize() {
@@ -33,64 +36,50 @@ unsigned int JGL::CachedFont::getFontIndex() {
return font_index;
}
//TODO make this code go faster.
CachedGlyph* JGL::CachedFont::getGlyph(char c) {
for (const auto& g : glyphs)
if (c == g->getCharacter())
return g;
auto it = glyphs.find(c);
if (it != glyphs.end())
return it->second;
return nullptr;
}
CachedFont::CachedFont(unsigned int font_size, unsigned int font_index) {
CachedFont::CachedFont(GLuint texture_id, GLsizei texture_width, GLsizei texture_height, unsigned int font_size, unsigned int font_index) {
this->texture = texture_id;
this->texture_width = texture_width;
this->texture_height = texture_height;
this->font_size = font_size;
this->font_index = font_index;
}
void CachedFont::eraseGlyph(CachedGlyph* glyph) {
if (glyph == nullptr)
return;
for (int i = 0; i < glyphs.size(); i++)
if (glyphs[i] == glyph)
glDeleteTextures(1, glyphs[i]->getTexture()),
delete glyphs[i],
glyphs.erase(glyphs.begin() + i);
std::map<char, CachedGlyph*> CachedFont::getGlyphs() {
return glyphs;
}
void CachedFont::eraseGlyph(char c) {
for (int i = 0; i < glyphs.size(); i++)
if (glyphs[i]->getCharacter() == c)
glDeleteTextures(1, glyphs[i]->getTexture()),
delete glyphs[i],
glyphs.erase(glyphs.begin() + i);
const GLuint* CachedFont::getTexture() {
return &texture;
}
void CachedFont::eraseGlyph(GLuint texture_id) {
for (int i = 0; i < glyphs.size(); i++)
if (glyphs[i]->getTexture() == &texture_id)
glDeleteTextures(1, glyphs[i]->getTexture()),
delete glyphs[i],
glyphs.erase(glyphs.begin() + i);
GLsizei CachedFont::getTextureWidth() const {
return texture_width;
}
std::vector<CachedGlyph*>* CachedFont::getGlyphs() {
return &glyphs;
GLsizei CachedFont::getTextureHeight() const {
return texture_height;
}
void FontCache::appendFont(CachedFont* font) {
cachedFonts.push_back(font);
}
void FontCache::newFont(unsigned int font_size, unsigned int font_index) {
auto* font = new CachedFont(font_size, font_index);
void FontCache::newFont(GLuint texture_id, GLsizei texture_width, GLsizei texture_height, unsigned int font_size, unsigned int font_index) {
auto* font = new CachedFont(texture_id, texture_width, texture_height, font_size, font_index);
cachedFonts.push_back(font);
}
void FontCache::eraseFont(CachedFont* font) {
for (int i = 0; i < cachedFonts.size(); i++) {
if (cachedFonts[i] == font) {
for (auto& g: *cachedFonts[i]->getGlyphs())
cachedFonts[i]->eraseGlyph(g);
delete cachedFonts[i];
cachedFonts.erase(cachedFonts.begin() + i);
}
@@ -101,11 +90,10 @@ void FontCache::purgeCache() {
//Remove every font from the cache.
for (const auto& font : cachedFonts)
eraseFont(font);
cachedFonts = {};
}
std::vector<CachedFont*>* FontCache::getFonts() {
return &cachedFonts;
std::vector<CachedFont*> FontCache::getFonts() {
return cachedFonts;
}
CachedFont* FontCache::getFont(unsigned int font_size, unsigned int font_index) {

View File

@@ -7,7 +7,8 @@
#include <JGL/Color3.h>
#include <jlog/jlog.hpp>
GLfloat oldColor[4] = {0, 0, 0, 255};
GLfloat oldColor[4] = {0, 0, 0, 1};
GLfloat baseColor[4] = {1, 1, 1, 1};
bool inJ2D = false;
bool inJ3D = false;
bool wasTexture2DEnabled = false;
@@ -17,16 +18,17 @@ bool wasVertexArraysEnabled = false;
bool wasCullFaceEnabled = false;
bool wasBlendEnabled = false;
bool wasColorArrayEnabled = false;
GLint activeTextureUnit = 0;
namespace JGL {
using namespace J3ML;
Vector2 wS;
bool Update(const Vector2& window_size) {
void Update(const Vector2& window_size) {
wS = window_size;
return JGL::InitTextEngine();
}
void J2D::Begin() {
glMatrixMode(GL_PROJECTION);
glPushMatrix();
@@ -36,6 +38,15 @@ namespace JGL {
glPushMatrix();
glLoadIdentity();
//Get what the draw color was before we did anything.
glGetFloatv(GL_CURRENT_COLOR, oldColor);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
glGetIntegerv(GL_ACTIVE_TEXTURE,& activeTextureUnit);
activeTextureUnit = activeTextureUnit - GL_TEXTURE0;
if (activeTextureUnit != 0)
glActiveTexture(GL_TEXTURE0);
wasDepthTestEnabled = false;
if (glIsEnabled(GL_DEPTH_TEST))
wasDepthTestEnabled = true,
@@ -44,7 +55,7 @@ namespace JGL {
wasVertexArraysEnabled = true;
if (!glIsEnabled(GL_VERTEX_ARRAY))
wasVertexArraysEnabled = false,
glEnable(GL_VERTEX_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
wasCullFaceEnabled = true;
if (!glIsEnabled(GL_CULL_FACE))
@@ -66,12 +77,12 @@ namespace JGL {
wasTextureCoordArrayEnabled = true;
if (!glIsEnabled(GL_TEXTURE_COORD_ARRAY))
wasTextureCoordArrayEnabled = false,
glEnable(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
wasColorArrayEnabled = false;
if (glIsEnabled(GL_COLOR_ARRAY))
wasColorArrayEnabled = true,
glDisable(GL_COLOR_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
if (!inJ3D)
inJ2D = true;
@@ -80,7 +91,6 @@ namespace JGL {
void J2D::End() {
//Change back to the previous projection (The 3D one in Re3D's case.)
glDisable(GL_TEXTURE_2D);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
@@ -89,7 +99,7 @@ namespace JGL {
glEnable(GL_DEPTH_TEST);
if (!wasVertexArraysEnabled)
glDisable(GL_VERTEX_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
if (!wasCullFaceEnabled)
glDisable(GL_CULL_FACE);
@@ -101,10 +111,13 @@ namespace JGL {
glDisable(GL_TEXTURE_2D);
if (!wasTextureCoordArrayEnabled)
glDisable(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
if (wasColorArrayEnabled)
glEnable(GL_COLOR_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
//Select whatever texture unit was selected before.
glActiveTexture(GL_TEXTURE0 + activeTextureUnit);
//Put the draw color back how it was before.
glColor4f(oldColor[0], oldColor[1], oldColor[2], oldColor[3]);
@@ -112,6 +125,65 @@ namespace JGL {
inJ2D = false;
}
//TODO rotation, I'm unsure if @josh wants degrees or radians.
void J2D::DrawSprite(GLuint texture, const Vector2& pos, const Vector2& size, u8 opacity, Inversion::Inversion inversion) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
std::array<Vector2, 4> textureCoordinates = {Vector2(0, 0), Vector2(0, 1), Vector2(1, 1), Vector2(1, 0)};;
const Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
if (inversion& Inversion::Vertical)
textureCoordinates = {Vector2(0, 1), Vector2(0, 0), Vector2(1, 0), Vector2(1, 1)};
if (inversion& Inversion::Horizontal)
textureCoordinates = {Vector2(1, 0), Vector2(1, 1), Vector2(0, 1), Vector2(0, 0)};
if ((inversion& Inversion::Horizontal) && (inversion& Inversion::Vertical))
textureCoordinates = {Vector2(1, 1), Vector2(1, 0), Vector2(0, 0), Vector2(0, 1)};
glColor4f(baseColor[0],baseColor[1],baseColor[2],opacity / 255.f);
glBindTexture(GL_TEXTURE_2D, texture);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), textureCoordinates.data());
glDrawArrays(GL_QUADS, 0, 4);
glBindTexture(GL_TEXTURE_2D, 0);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
Vector2 vertices[] = {v1, v2, v3, v4};
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_QUADS, 0, 4);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillQuad(const Color3& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4) {
J2D::FillQuad(Color4(color), v1, v2, v3, v4);
}
void J2D::OutlineQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
Vector2 vertices[] = {v1, v2, v3, v4};
glLineWidth(thickness);
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINE_LOOP, 0, 4);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::OutlineQuad(const Color3& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness) {
J2D::OutlineQuad(Color4(color), v1, v2, v3, v4);
}
void J2D::DrawSprite(GLuint texture, float x, float y, float w, float h, u8 opacity, Inversion::Inversion inversion) {
J2D::DrawSprite(texture, {x, y}, {w, h}, opacity, inversion);
}
void J2D::FillRect(const Color4& color, const Vector2& pos, const Vector2& size) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
@@ -120,13 +192,14 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_QUADS, 0, 4);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillRect(const Color3& color, const Vector2& pos, const Vector2& size) {
J2D::FillRect({color.r, color.g, color.b, 255}, pos, size);
}
void J2D::FillGradientRect(const Color4& color1, const Color4& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size) {
void J2D::FillGradientRect(const Color4& color1, const Color4& color2, const Gradient::Gradient& gradient, const Vector2& pos, const Vector2& size) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
@@ -151,18 +224,19 @@ namespace JGL {
(color1.b + color2.b) / 2.f / 255.f, (color1.a + color2.a) / 2.f / 255.f,color2.r / 255.f, color2.g / 255.f, color2.b / 255.f, color2.a / 255.f,
(color1.r + color2.r) / 2.f / 255.f, (color1.g + color2.g) / 2.f / 255.f, (color1.b + color2.b) / 2.f / 255.f,(color1.a + color2.a) / 2.f / 255.f};
glEnable(GL_COLOR_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glColorPointer(4, GL_FLOAT, 0, colors.data());
glDrawArrays(GL_QUADS, 0, 4);
glDisable(GL_COLOR_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillGradientRect(const Color3& color1, const Color3& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size) {
void J2D::FillGradientRect(const Color3& color1, const Color3& color2, const Gradient::Gradient& gradient, const Vector2& pos, const Vector2& size) {
J2D::FillGradientRect({color1.r, color1.g, color1.b, 255}, {color2.r, color2.g, color2.b, 255}, gradient, pos, size);
}
void J2D::FillRoundedRect(const Color4 &color, const Vector2 &pos, const Vector2 &size, float radius, unsigned int subdivisions) {
void J2D::FillRoundedRect(const Color4& color, const Vector2& pos, const Vector2& size, float radius, unsigned int subdivisions) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
@@ -189,6 +263,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINE_LOOP, 0, 4);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::OutlineRect(const Color3& color, const Vector2& pos, const Vector2& size, float thickness) {
@@ -205,6 +280,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINES, 0, 2);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::DrawLine(const Color3& color, const Vector2& A, const Vector2& B, float thickness) {
@@ -227,12 +303,13 @@ namespace JGL {
GLfloat colors[8] = {color1.r / 255.f, color1.g / 255.f, color1.b / 255.f, color1.a / 255.f,
color2.r / 255.f, color2.g / 255.f, color2.b / 255.f, color2.a / 255.f};
glEnable(GL_COLOR_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glLineWidth(thickness);
glColorPointer(4,GL_FLOAT,sizeof(GL_FLOAT) * 4, colors);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINES, 0, 2);
glDisable(GL_COLOR_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::DrawGradientLine(const Color3& color1, const Color3& color2, const Vector2& A, const Vector2& B, float thickness) {
@@ -255,6 +332,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINES, 0, 1);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::DrawPixel(const Color3& color, const Vector2& coordinates) {
@@ -287,6 +365,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
glDrawArrays(GL_LINE_LOOP, 0, vertices.size());
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::OutlineCircle(const Color3& color, const Vector2& center, float radius, unsigned int subdivisions, float thickness) {
@@ -309,6 +388,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
glDrawArrays(GL_TRIANGLE_FAN, 0, vertices.size());
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillCircle(const Color3& color, const Vector2& center, float radius, unsigned int subdivisions) {
@@ -325,13 +405,14 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_LINE_LOOP, 0, 3);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::OutlineTriangle(const Color3& color, const Triangle2D& tri, float thickness) {
J2D::OutlineTriangle({color.r, color.g, color.b, 255}, tri, thickness);
}
void J2D::FillTriangle(const Color4& color, const Triangle2D &tri) {
void J2D::FillTriangle(const Color4& color, const Triangle2D& tri) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
@@ -340,9 +421,32 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_TRIANGLES, 0, 3);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillTriangle(const Color3& color, const Triangle2D &tri) {
void J2D::FillGradientTriangle(const Color4& a_color, const Color4& b_color, const Color4& c_color, const Triangle2D& tri) {
if (!inJ2D)
ERROR("Attempt to Render J2D element before J2D begin.")
Vector2 vertices[] = {{tri.A.x, tri.A.y}, {tri.B.x, tri.B.y}, {tri.C.x, tri.C.y}};
GLfloat colors[] = {a_color.r / 255.f, a_color.g / 255.f, a_color.b / 255.f, a_color.a / 255.f,b_color.r / 255.f,
b_color.g / 255.f, b_color.b / 255.f, b_color.a / 255.f,c_color.r / 255.f, c_color.g / 255.f, c_color.b / 255.f,
c_color.a / 255.f };
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_FLOAT, sizeof(Color4), colors);
glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
glDrawArrays(GL_TRIANGLES, 0, 3);
glDisableClientState(GL_COLOR_ARRAY);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J2D::FillGradientTriangle(const Color3& a_color, const Color3& b_color, const Color3& c_color, const Triangle2D& tri) {
J2D::FillGradientTriangle(Color4(a_color), Color4(b_color), Color4(c_color), tri);
}
void J2D::FillTriangle(const Color3& color, const Triangle2D& tri) {
J2D::FillTriangle({color.r, color.g, color.b, 255}, tri);
}
@@ -350,6 +454,7 @@ namespace JGL {
//Get what the draw color was before we did anything.
glGetFloatv(GL_CURRENT_COLOR, oldColor);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
wasDepthTestEnabled = false;
if (glIsEnabled(GL_DEPTH_TEST))
@@ -359,14 +464,14 @@ namespace JGL {
wasVertexArraysEnabled = false;
if (!glIsEnabled(GL_VERTEX_ARRAY))
wasVertexArraysEnabled = false,
glEnable(GL_VERTEX_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
wasTexture2DEnabled = true;
if (!glIsEnabled(GL_TEXTURE_2D))
wasTexture2DEnabled = false,
glEnable(GL_TEXTURE_2D);
//TODO We won't always want this but for now we do.
// TODO: implement bool drawBackface as DrawString parameter.
wasCullFaceEnabled = false;
if (glIsEnabled(GL_CULL_FACE))
wasCullFaceEnabled = true,
@@ -382,22 +487,20 @@ namespace JGL {
if (!inJ2D)
inJ3D = true;
else { ERROR("Attempt to Begin J3D inside of J2D context.") }
else { ERROR("Attempt to Begin J3D inside of J2D context.")}
}
void J3D::End() {
glDisable(GL_TEXTURE_2D);
if (wasDepthTestEnabled)
glEnable(GL_DEPTH_TEST);
if (!wasVertexArraysEnabled)
glDisable(GL_VERTEX_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
if (wasTexture2DEnabled)
glDisable(GL_TEXTURE_2D);
if (wasBlendEnabled)
if (!wasBlendEnabled)
glDisable(GL_BLEND);
if (wasCullFaceEnabled)
@@ -419,6 +522,7 @@ namespace JGL {
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices);
glDrawArrays(GL_LINES, 0, 2);
glColor4f(baseColor[0], baseColor[1], baseColor[2], baseColor[3]);
}
void J3D::DrawLine(const Color3& color, const Vector3& A, const Vector3& B, float thickness) {

19
src/JGL/Color3.cpp Normal file
View File

@@ -0,0 +1,19 @@
#include <JGL/Color3.h>
namespace JGL
{
u8 Color3::RedChannel() const { return r; }
u8 Color3::GreenChannel() const { return g; }
u8 Color3::BlueChannel() const { return b; }
float Color3::RedChannelNormalized() const { return static_cast<float>(r) / 255.f;}
float Color3::BlueChannelNormalized() const { return static_cast<float>(b) / 255.f;}
float Color3::GreenChannelNormalized() const { return static_cast<float>(g) / 255.f;}
Color3::Color3(u8 R, u8 G, u8 B) : r(R), g(G), b(B) {}
}

27
src/JGL/Color4.cpp Normal file
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@@ -0,0 +1,27 @@
#include <JGL/Color4.h>
namespace JGL
{
Color4::Color4(u8 red, u8 green, u8 blue, u8 alpha) : r(red), g(green), b(blue), a(alpha) {}
Color4::Color4(const Color3 &color3, u8 alpha) {r = color3.r; g = color3.g; b = color3.b; a = alpha;}
Color4 Color4::FromColor3(const Color3 &color3, u8 alpha) {return Color4(color3, alpha);}
u8 Color4::RedChannel() const { return r;}
u8 Color4::GreenChannel() const { return g;}
u8 Color4::BlueChannel() const {return b;}
u8 Color4::AlphaChannel() const {return a;}
float Color4::RedChannelNormalized() const {return static_cast<float>(r/255.f); }
float Color4::GreenChannelNormalized() const {return static_cast<float>(g/255.f); }
float Color4::BlueChannelNormalized() const {return static_cast<float>(b/255.f); }
float Color4::AlphaChannelNormalized() const {return static_cast<float>(a/255.f); }
}

165
src/JGL/Font.cpp Normal file
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@@ -0,0 +1,165 @@
#include <vector>
#include <string>
#include <iostream>
#include <glad/glad.h>
#if __linux__
#include <freetype2/ft2build.h>
#include FT_FREETYPE_H
#include FT_OUTLINE_H
#include <JGL/FontCache.h>
#endif
#if _WIN32
#include <ft2build.h>
#include FT_FREETYPE_H
#endif
#include <JGL/Font.h>
namespace JGL::Detail
{
FT_Library ft;
std::vector<Font> fonts;
bool InitTextEngine() {
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // NOTE: This MUST be called for text rendering to work properly!!!
// Keep note of this, might cause problems later?
if (ft != nullptr)
throw std::runtime_error("Error::FREETYPE: FT_Library was initialized but is already initialized.");
if (FT_Init_FreeType(&ft))
return true;
return false;
}
void UnloadFont(int font_index) {
auto iter = fonts.begin();
while (iter != fonts.end())
{
if (iter->index == font_index){
FT_Done_Face(iter->face);
iter = fonts.erase(iter);
} else ++iter;
}
}
}
namespace JGL
{
bool InitTextEngine()
{
return Detail::InitTextEngine();
}
Font::Font(const std::filesystem::path& path)
{
if (Detail::ft == nullptr)
throw new std::runtime_error("Error::FREETYPE: FT_Library was not initialized before attempting to load a font!");
Font font;
if (FT_New_Face(Detail::ft, path.c_str(), 0, &face)) {
std::cout << "Error::FREETYPE: Failed to load font!" << std::endl;
throw new std::runtime_error("Error::FREETYPE: Failed to load font!");
//return -1;
}
unsigned int newIndex = 0;
for (const auto& f : Detail::fonts)
if (f.index >= newIndex)
newIndex = f.index + 1;
index = newIndex;
Detail::fonts.push_back(font);
std::cout << "Loaded font from " << path << " with index " << newIndex << std::endl;
//return newIndex;
}
Font::~Font()
{
//Detail::UnloadFont(this->index);
}
std::vector<Font> Font::GetLoadedFonts() {
return Detail::fonts;
}
Font Font::LoadTTF(const std::filesystem::path& path)
{
return Font(path);
}
Vector2 Font::MeasureString(const std::string &text, unsigned int ptSize) {
// TODO: Check if a font of that size is in the cache and if so use the info from that because this is sloooooooooooooow.
// That'll make it go vroom vroom.
// TODO: Work in-progress implementation unfortunately.
// This is likely returning slightly incorrect results for likely several reasons.
// Half-ass solution for now ~ dawsh.
Vector2 extents = Vector2(0,0);
bool font_of_size_in_cache = false;
for(const auto& f : fontCache.getFonts()) {
if (f->getFontSize() == ptSize) {
font_of_size_in_cache = true;
break;
}
}
if (font_of_size_in_cache) {
CachedFont* font;
for (auto* f: fontCache.getFonts())
if (f->getFontSize() == ptSize)
font = f;
for (const char& c : text)
extents.x += font->getGlyph(c)->advanceX;
extents.y = ptSize;
return extents;
}
FT_Set_Pixel_Sizes(this->face, ptSize, ptSize);
for (const char& c : text) {
FT_GlyphSlot slot = face->glyph;
auto glyph_index = FT_Get_Char_Index(this->face, c);
auto error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
if (error)
continue;
Vector2 advance = {static_cast<float>(slot->advance.x >> 6),
static_cast<float>(slot->advance.y >> 6)};
extents += advance;
// Gives smaller results than we'd want.
if (extents.y < slot->metrics.height / 64) {
extents.y = slot->metrics.height / 64;
}
// Just fucking hardcode it, we know the glyph height is roughly always the ptSize anyway.
if (extents.y < ptSize)
{
extents.y = ptSize;
}
}
return extents;
}
}

View File

@@ -1,139 +1,164 @@
#include <JGL/JGL.h>
#if __linux__
#include <freetype2/ft2build.h>
#include FT_FREETYPE_H
#include <freetype2/ft2build.h>
#include FT_FREETYPE_H
#include FT_OUTLINE_H
#include "jlog/jlog.hpp"
#endif
#if _WIN32
#include <ft2build.h>
#include FT_FREETYPE_H
#include <ft2build.h>
#include FT_FREETYPE_H
#endif
#include <JGL/Font.h>
#include <JGL/FontCache.h>
namespace JGL {
FT_Library ft;
struct Font {
int index = 0;
FT_Face face;
};
std::vector<Font> faces;
int LoadFont(const std::string &font_path) {
if (ft == nullptr)
return -1;
Font font;
if (FT_New_Face(ft, font_path.c_str(), 0, &font.face)) {
std::cout << "Error::FREETYPE: Failed to load font!" << std::endl;
return -1;
}
unsigned int newIndex = 0;
for (const auto& f : faces)
if (f.index >= newIndex)
newIndex = f.index + 1;
font.index = newIndex;
faces.push_back(font);
std::cout << "Loaded font from " << font_path << " with index " << newIndex << std::endl;
return newIndex;
void PurgeFontCache() {
fontCache.purgeCache();
}
bool InitTextEngine() {
if (FT_Init_FreeType(&ft))
return true;
return false;
}
void UnloadFont(int font_index) {
for (int i = 0; i < faces.size(); i++)
if (faces[i].index == font_index)
FT_Done_Face(faces[i].face),
faces.erase(faces.begin() + i);
}
FontCache fontCache;
void J2D::DrawString(const Color3& color, std::string text, float x, float y, float scale, u32 size, unsigned int font_index) {
void J2D::DrawString(const Color4& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font) {
glUseProgram(0); // Fixed-function pipeline.
Font font{};
CachedFont* cachedFont = fontCache.getFont(size, font_index);
// Offset by height to render at "correct" location.
y += size;
//If the font doesn't exist in the cache yet.
if (!cachedFont) {
fontCache.newFont(size, font_index);
cachedFont = fontCache.getFont(size, font_index);
}
CachedFont* cachedFont = fontCache.getFont(size, font.index);
//Set up the regular font.
for (const auto& f : faces)
if (f.index == font_index)
font = f;
//for (const auto &f : Font::GetLoadedFonts())
// if (f.index == font.index)
// font = f;
if (font.face == nullptr)
return;
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, 1.0f);
FT_Set_Pixel_Sizes(font.face, 0, size);
std::vector<GLuint> textures(text.length());
//If the font doesn't exist in the cache yet.
if (!cachedFont) {
DEBUG("Caching font data...");
GLuint texture_id;
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
//For each character
for (int i = 0; i < text.length(); i++) {
float x2, y2, w, h;
//If the font is in the cache already.
if (cachedFont->getGlyph(text.c_str()[i])) {
CachedGlyph* glyph = cachedFont->getGlyph(text.c_str()[i]);
GLsizei width = 0;
GLsizei max_height = 0;
glBindTexture(GL_TEXTURE_2D, *glyph->getTexture());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
FT_ULong charcode;
FT_UInt gindex;
x2 = x + glyph->x2offset * scale;
y2 = y - glyph->y2offset * scale; // Adjust y-coordinate
w = glyph->w * scale;
h = glyph->h * scale;
x += glyph->advanceX * scale;
y += glyph->advanceY * scale;
//We have to loop over the available glyphs twice as we need the
//final width and height of the texture before we can construct it
//and subsequently upload the glyph data.
} else {
if (FT_Load_Char(font.face, text.c_str()[i], FT_LOAD_RENDER))
continue;
charcode = FT_Get_First_Char(font.face, &gindex);
//Strings are char-based so we only handle charcodes within the extended ASCII range.
while (gindex != 0 && charcode < 255) {
if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
FT_GlyphSlot g = font.face->glyph;
glGenTextures(1, &textures.at(i));
glBindTexture(GL_TEXTURE_2D, textures[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, g->bitmap.width, g->bitmap.rows, 0, GL_ALPHA, GL_UNSIGNED_BYTE, g->bitmap.buffer);
x2 = x + g->bitmap_left * scale;
y2 = -y - g->bitmap_top * scale; // Adjust y-coordinate
w = g->bitmap.width * scale;
h = g->bitmap.rows * scale;
x += (g->advance.x >> 6) * scale;
y += (g->advance.y >> 6) * scale;
cachedFont->appendGlyph(new CachedGlyph(textures.at(i), text.c_str()[i], g->bitmap_left, g->bitmap_top, g->bitmap.width, g->bitmap.rows, (g->advance.x >> 6), (g->advance.y >> 6)));
width += g->bitmap.width;
max_height = std::max(max_height, (GLsizei)g->bitmap.rows);
charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
}
GLfloat vertices[12] = {x2, y2, x2, y2 + h, x2 + w, y2 + h,x2, y2, x2 + w, y2 + h, x2 + w, y2};
fontCache.newFont(texture_id, width, max_height, size, font.index);
cachedFont = fontCache.getFont(size, font.index);
GLfloat textureCoordinates[12] = {0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0};
glTexCoordPointer(2, GL_FLOAT, sizeof(GL_FLOAT) * 2, &textureCoordinates);
glVertexPointer(2, GL_FLOAT, sizeof(GL_FLOAT) * 2, &vertices);
glDrawArrays(GL_TRIANGLES, 0, 6);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, max_height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, nullptr);
GLsizei xoffset = 0;
charcode = FT_Get_First_Char(font.face, &gindex);
while (gindex != 0 && charcode < 255) {
if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
FT_GlyphSlot g = font.face->glyph;
glTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, 0, g->bitmap.width, g->bitmap.rows, GL_ALPHA, GL_UNSIGNED_BYTE, g->bitmap.buffer);
GLfloat u0 = (GLfloat)xoffset / cachedFont->getTextureWidth();
GLfloat u1 = u0 + (GLfloat)g->bitmap.width / cachedFont->getTextureWidth();
GLfloat v0 = 0.0f;
GLfloat v1 = (GLfloat)g->bitmap.rows / cachedFont->getTextureHeight();
std::array<GLfloat, 12> texcoords = {
u0, v0,
u0, v1,
u1, v1,
u0, v0,
u1, v1,
u1, v0
};
cachedFont->appendGlyph(new CachedGlyph((char)charcode, texcoords, g->bitmap_left, g->bitmap_top, g->bitmap.width, g->bitmap.rows, (g->advance.x >> 6), (g->advance.y >> 6)));
xoffset += g->bitmap.width;
charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
}
}
glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture
glColor4f(color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f);
//Texture parameters are restored when the texture is bound
glBindTexture(GL_TEXTURE_2D, *cachedFont->getTexture());
std::vector<std::array<GLfloat, 12>> vertices(text.size());
std::vector<std::array<GLfloat, 12>> texcoords(text.size());
for (int i = 0; i < text.length(); i++) {
float x2, y2, w, h;
CachedGlyph *glyph = cachedFont->getGlyph(text.c_str()[i]);
if (glyph == nullptr) continue;
x2 = x + glyph->x2offset * scale;
y2 = y - glyph->y2offset * scale; // Adjust y-coordinate
w = glyph->w * scale;
h = glyph->h * scale;
x += glyph->advanceX * scale;
y += glyph->advanceY * scale;
std::array<GLfloat, 12> glyph_vertices = {
x2, y2,
x2, y2 + h,
x2 + w, y2 + h,
x2, y2,
x2 + w, y2 + h,
x2 + w, y2
};
auto glyph_texcoords = glyph->getTexCoords();
vertices[i] = glyph_vertices;
texcoords[i] = glyph_texcoords;
}
glVertexPointer(2, GL_FLOAT, sizeof(GLfloat) * 2, vertices.data());
glTexCoordPointer(2, GL_FLOAT, sizeof(GLfloat) * 2, texcoords.data());
glDrawArrays(GL_TRIANGLES, 0, vertices.size() * 6);
glBindTexture(GL_TEXTURE_2D, 0);
glColor4f(1, 1, 1, 1);
}
void J3D::DrawString(const Color3& color, const std::string& text, const Vector3& pos, const Vector3& angle, float scale, u32 size, unsigned int font_index) {
void J2D::DrawString(const Color3& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font) {
J2D::DrawString(Color4::FromColor3(color, 255), text, x, y, scale, size, font);
}
void J3D::DrawString(const Color3& color, const std::string& text, const Vector3& pos, const Vector3& angle, float scale, u32 size, const Font& font) {
//TODO figure out what the scale should actually be mathematically.
scale = scale * 0.002f;
scale = -scale;
@@ -141,14 +166,14 @@ namespace JGL {
float x = pos.x;
float y = pos.y;
float z = pos.z;
std::vector<GLuint> textures(text.length());;
std::vector<GLuint> textures(text.length());
glUseProgram(0); // Fixed-function pipeline.
glColor4f(color.r, color.g, color.b, 1.0f);
Font font;
for (auto& f : faces)
if (f.index == font_index)
font = f;
//Font font;
//for (auto& f : Font::GetLoadedFonts())
//if (f.index == font.index)
//font = f;
if (font.face == NULL) {
std::cout << "null font" << std::endl;
return;
@@ -217,7 +242,7 @@ namespace JGL {
glDeleteTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture
glColor4f(1, 1, 1, 1);
glPopMatrix();
}
}