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1#ifndef _SDL_GPU_OPENGL_4_H__
2#define _SDL_GPU_OPENGL_4_H__
3
4#include "SDL_gpu.h"
5
6#if !defined(SDL_GPU_DISABLE_OPENGL) && !defined(SDL_GPU_DISABLE_OPENGL_4)
7
8 // Hacks to fix compile errors due to polluted namespace
9 #ifdef _WIN32
10 #define _WINUSER_H
11 #define _WINGDI_H
12 #endif
13
14 #include "glew.h"
15
16 #if defined(GL_EXT_bgr) && !defined(GL_BGR)
17 #define GL_BGR GL_BGR_EXT
18 #endif
19 #if defined(GL_EXT_bgra) && !defined(GL_BGRA)
20 #define GL_BGRA GL_BGRA_EXT
21 #endif
22 #if defined(GL_EXT_abgr) && !defined(GL_ABGR)
23 #define GL_ABGR GL_ABGR_EXT
24 #endif
25#endif
26
27
28#define GPU_CONTEXT_DATA ContextData_OpenGL_4
29#define GPU_IMAGE_DATA ImageData_OpenGL_4
30#define GPU_TARGET_DATA TargetData_OpenGL_4
31
32
33
34#define GPU_DEFAULT_TEXTURED_VERTEX_SHADER_SOURCE \
35"#version 400\n\
36\
37in vec2 gpu_Vertex;\n\
38in vec2 gpu_TexCoord;\n\
39in vec4 gpu_Color;\n\
40uniform mat4 gpu_ModelViewProjectionMatrix;\n\
41\
42out vec4 color;\n\
43out vec2 texCoord;\n\
44\
45void main(void)\n\
46{\n\
47 color = gpu_Color;\n\
48 texCoord = vec2(gpu_TexCoord);\n\
49 gl_Position = gpu_ModelViewProjectionMatrix * vec4(gpu_Vertex, 0.0, 1.0);\n\
50}"
51
52#define GPU_DEFAULT_UNTEXTURED_VERTEX_SHADER_SOURCE \
53"#version 400\n\
54\
55in vec2 gpu_Vertex;\n\
56in vec4 gpu_Color;\n\
57uniform mat4 gpu_ModelViewProjectionMatrix;\n\
58\
59out vec4 color;\n\
60\
61void main(void)\n\
62{\n\
63 color = gpu_Color;\n\
64 gl_Position = gpu_ModelViewProjectionMatrix * vec4(gpu_Vertex, 0.0, 1.0);\n\
65}"
66
67
68#define GPU_DEFAULT_TEXTURED_FRAGMENT_SHADER_SOURCE \
69"#version 400\n\
70\
71in vec4 color;\n\
72in vec2 texCoord;\n\
73\
74uniform sampler2D tex;\n\
75\
76out vec4 fragColor;\n\
77\
78void main(void)\n\
79{\n\
80 fragColor = texture(tex, texCoord) * color;\n\
81}"
82
83#define GPU_DEFAULT_UNTEXTURED_FRAGMENT_SHADER_SOURCE \
84"#version 400\n\
85\
86in vec4 color;\n\
87\
88out vec4 fragColor;\n\
89\
90void main(void)\n\
91{\n\
92 fragColor = color;\n\
93}"
94
95
96typedef struct ContextData_OpenGL_4
97{
98 SDL_Color last_color;
99 GPU_bool last_use_texturing;
100 unsigned int last_shape;
101 GPU_bool last_use_blending;
102 GPU_BlendMode last_blend_mode;
103 GPU_Rect last_viewport;
104 GPU_Camera last_camera;
105 GPU_bool last_camera_inverted;
106
107 GPU_bool last_depth_test;
108 GPU_bool last_depth_write;
109 GPU_ComparisonEnum last_depth_function;
110
111 GPU_Image* last_image;
112 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, ...]).
113 unsigned short blit_buffer_num_vertices;
114 unsigned short blit_buffer_max_num_vertices;
115 unsigned short* index_buffer; // Indexes into the blit buffer so we can use 4 vertices for every 2 triangles (1 quad)
116 unsigned int index_buffer_num_vertices;
117 unsigned int index_buffer_max_num_vertices;
118
119 // Tier 3 rendering
120 unsigned int blit_VAO;
121 unsigned int blit_VBO[2]; // For double-buffering
122 unsigned int blit_IBO;
123 GPU_bool blit_VBO_flop;
124
125 GPU_AttributeSource shader_attributes[16];
126 unsigned int attribute_VBO[16];
127} ContextData_OpenGL_4;
128
129typedef struct ImageData_OpenGL_4
130{
131 int refcount;
132 GPU_bool owns_handle;
133 Uint32 handle;
134 Uint32 format;
135} ImageData_OpenGL_4;
136
137typedef struct TargetData_OpenGL_4
138{
139 int refcount;
140 Uint32 handle;
141 Uint32 format;
142} TargetData_OpenGL_4;
143
144
145
146#endif