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1#ifndef _SDL_GPU_GLES_3_H__
2#define _SDL_GPU_GLES_3_H__
3
4#include "SDL_gpu.h"
5#include "SDL_platform.h"
6
7#if !defined(SDL_GPU_DISABLE_GLES) && !defined(SDL_GPU_DISABLE_GLES_3)
8
9#ifdef __IPHONEOS__
10 #include <OpenGLES/ES3/gl.h>
11 #include <OpenGLES/ES3/glext.h>
12#elif defined(SDL_GPU_DYNAMIC_GLES_3)
13 #include "gl3stub.h"
14#else
15 #include "GLES3/gl3.h"
16 #include "GLES2/gl2ext.h"
17#endif
18
19 #define glVertexAttribI1i glVertexAttrib1f
20 #define glVertexAttribI2i glVertexAttrib2f
21 #define glVertexAttribI3i glVertexAttrib3f
22 #define glVertexAttribI1ui glVertexAttrib1f
23 #define glVertexAttribI2ui glVertexAttrib2f
24 #define glVertexAttribI3ui glVertexAttrib3f
25 #define glMapBuffer glMapBufferOES
26 #define glUnmapBuffer glUnmapBufferOES
27 #define GL_WRITE_ONLY GL_WRITE_ONLY_OES
28#endif
29
30
31
32#define GPU_CONTEXT_DATA ContextData_GLES_3
33#define GPU_IMAGE_DATA ImageData_GLES_3
34#define GPU_TARGET_DATA TargetData_GLES_3
35
36
37#define GPU_DEFAULT_TEXTURED_VERTEX_SHADER_SOURCE \
38"#version 300 es\n\
39precision highp float;\n\
40precision mediump int;\n\
41\
42in vec2 gpu_Vertex;\n\
43in vec2 gpu_TexCoord;\n\
44in mediump vec4 gpu_Color;\n\
45uniform mat4 gpu_ModelViewProjectionMatrix;\n\
46\
47out mediump vec4 color;\n\
48out vec2 texCoord;\n\
49\
50void main(void)\n\
51{\n\
52 color = gpu_Color;\n\
53 texCoord = vec2(gpu_TexCoord);\n\
54 gl_Position = gpu_ModelViewProjectionMatrix * vec4(gpu_Vertex, 0.0, 1.0);\n\
55}"
56
57// Tier 3 uses shader attributes to send position, texcoord, and color data for each vertex.
58#define GPU_DEFAULT_UNTEXTURED_VERTEX_SHADER_SOURCE \
59"#version 300 es\n\
60precision highp float;\n\
61precision mediump int;\n\
62\
63in vec2 gpu_Vertex;\n\
64in mediump vec4 gpu_Color;\n\
65uniform mat4 gpu_ModelViewProjectionMatrix;\n\
66\
67out mediump vec4 color;\n\
68\
69void main(void)\n\
70{\n\
71 color = gpu_Color;\n\
72 gl_Position = gpu_ModelViewProjectionMatrix * vec4(gpu_Vertex, 0.0, 1.0);\n\
73}"
74
75
76#define GPU_DEFAULT_TEXTURED_FRAGMENT_SHADER_SOURCE \
77"#version 300 es\n\
78#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
79precision highp float;\n\
80#else\n\
81precision mediump float;\n\
82#endif\n\
83precision mediump int;\n\
84\
85in mediump vec4 color;\n\
86in vec2 texCoord;\n\
87\
88uniform sampler2D tex;\n\
89\
90out vec4 fragColor;\n\
91\
92void main(void)\n\
93{\n\
94 fragColor = texture(tex, texCoord) * color;\n\
95}"
96
97#define GPU_DEFAULT_UNTEXTURED_FRAGMENT_SHADER_SOURCE \
98"#version 300 es\n\
99#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
100precision highp float;\n\
101#else\n\
102precision mediump float;\n\
103#endif\n\
104precision mediump int;\n\
105\
106in mediump vec4 color;\n\
107\
108out vec4 fragColor;\n\
109\
110void main(void)\n\
111{\n\
112 fragColor = color;\n\
113}"
114
115
116
117
118typedef struct ContextData_GLES_3
119{
120 SDL_Color last_color;
121 GPU_bool last_use_texturing;
122 unsigned int last_shape;
123 GPU_bool last_use_blending;
124 GPU_BlendMode last_blend_mode;
125 GPU_Rect last_viewport;
126 GPU_Camera last_camera;
127 GPU_bool last_camera_inverted;
128
129 GPU_bool last_depth_test;
130 GPU_bool last_depth_write;
131 GPU_ComparisonEnum last_depth_function;
132
133 GPU_Image* last_image;
134 float* blit_buffer; // Holds sets of 4 vertices, each with interleaved position, tex coords, and colors (e.g. [x0, y0, z0, s0, t0, r0, g0, b0, a0, ...]).
135 unsigned short blit_buffer_num_vertices;
136 unsigned short blit_buffer_max_num_vertices;
137 unsigned short* index_buffer; // Indexes into the blit buffer so we can use 4 vertices for every 2 triangles (1 quad)
138 unsigned int index_buffer_num_vertices;
139 unsigned int index_buffer_max_num_vertices;
140
141 // Tier 3 rendering
142 unsigned int blit_VAO;
143 unsigned int blit_VBO[2]; // For double-buffering
144 unsigned int blit_IBO;
145 GPU_bool blit_VBO_flop;
146
147 GPU_AttributeSource shader_attributes[16];
148 unsigned int attribute_VBO[16];
149} ContextData_GLES_3;
150
151typedef struct ImageData_GLES_3
152{
153 int refcount;
154 GPU_bool owns_handle;
155 Uint32 handle;
156 Uint32 format;
157} ImageData_GLES_3;
158
159typedef struct TargetData_GLES_3
160{
161 int refcount;
162 Uint32 handle;
163 Uint32 format;
164} TargetData_GLES_3;
165
166
167
168#endif