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gsdx-ogl: add a layer to emulate DSA for texture 

Framebuffer function will be nice too
This commit is contained in:
Gregory Hainaut 2015-04-24 19:32:00 +02:00
parent f71eb171cf
commit 6d31d1e0d0
1 changed files with 44 additions and 0 deletions
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44
plugins/GSdx/GLLoader.cpp
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@ -146,6 +146,47 @@ PFNGLTEXTUREBARRIERPROC gl_TextureBarrier = NU
#endif
namespace Emulate_DSA {
void BindTextureUnit(GLuint unit, GLuint texture) {
gl_ActiveTexture(GL_TEXTURE0 + unit);
glBindTexture(GL_TEXTURE_2D, texture);
}
void CreateTexture(GLenum target, GLsizei n, GLuint *textures) {
glGenTextures(1, textures);
}
void TextureStorage(GLuint texture, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height) {
BindTextureUnit(7, texture);
gl_TexStorage2D(GL_TEXTURE_2D, levels, internalformat, width, height);
}
void TextureSubImage(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels) {
BindTextureUnit(7, texture);
glTexSubImage2D(GL_TEXTURE_2D, level, xoffset, yoffset, width, height, format, type, pixels);
}
void CopyTextureSubImage(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height) {
BindTextureUnit(7, texture);
glCopyTexSubImage2D(GL_TEXTURE_2D, level, xoffset, yoffset, x, y, width, height);
}
void GetTexureImage(GLuint texture, GLint level, GLenum format, GLenum type, GLsizei bufSize, void *pixels) {
BindTextureUnit(7, texture);
glGetTexImage(GL_TEXTURE_2D, level, format, type, pixels);
}
void Init() {
fprintf(stderr, "DSA is not supported. Replace GL function pointer to emulate it\n");
gl_BindTextureUnit = BindTextureUnit;
gl_CreateTextures = CreateTexture;
gl_TextureStorage2D = TextureStorage;
gl_TextureSubImage2D = TextureSubImage;
gl_CopyTextureSubImage2D = CopyTextureSubImage;
gl_GetTextureImage = GetTexureImage;
}
}
namespace GLLoader {
bool fglrx_buggy_driver = false;
@ -334,6 +375,9 @@ namespace GLLoader {
#else // ENABLE_GLES
status &= status_and_override(found_GL_EXT_shader_io_blocks, "GL_EXT_shader_io_blocks", true);
#endif
if (!found_GL_ARB_direct_state_access) {
Emulate_DSA::Init();
}
fprintf(stderr, "\n");