diff options
Diffstat (limited to 'source/blender/gpu/intern/gpu_extensions.c')
| -rw-r--r-- | source/blender/gpu/intern/gpu_extensions.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/source/blender/gpu/intern/gpu_extensions.c b/source/blender/gpu/intern/gpu_extensions.c index bc6e24f5072..c602fdad18e 100644 --- a/source/blender/gpu/intern/gpu_extensions.c +++ b/source/blender/gpu/intern/gpu_extensions.c @@ -40,6 +40,7 @@ #include "BLI_blenlib.h" #include "BLI_utildefines.h" #include "BLI_math_base.h" +#include "BLI_math_vector.h" #include "BKE_global.h" @@ -113,6 +114,9 @@ static struct GPUGlobal { GPUTexture *invalid_tex_1D; /* texture used in place of invalid textures (not loaded correctly, missing) */ GPUTexture *invalid_tex_2D; GPUTexture *invalid_tex_3D; + float dfdyfactors[2]; /* workaround for different calculation of dfdy factors on GPUs. Some GPUs/drivers + calculate dfdy in shader differently when drawing to an offscreen buffer. First + number is factor on screen and second is off-screen */ } GG = {1, 0}; /* Number of maximum output slots. We support 4 outputs for now (usually we wouldn't need more to preserve fill rate) */ @@ -144,10 +148,15 @@ int GPU_max_texture_size(void) return GG.maxtexsize; } +void GPU_get_dfdy_factors(float fac[2]) +{ + copy_v2_v2(fac, GG.dfdyfactors); +} + void gpu_extensions_init(void) { GLint r, g, b; - const char *vendor, *renderer; + const char *vendor, *renderer, *version; /* glewIsSupported("GL_VERSION_2_0") */ @@ -168,6 +177,7 @@ void gpu_extensions_init(void) vendor = (const char *)glGetString(GL_VENDOR); renderer = (const char *)glGetString(GL_RENDERER); + version = (const char *)glGetString(GL_VERSION); if (strstr(vendor, "ATI")) { GG.device = GPU_DEVICE_ATI; @@ -244,6 +254,23 @@ void gpu_extensions_init(void) #endif + /* df/dy calculation factors, those are dependent on driver */ + if ((strstr(vendor, "ATI") && strstr(version, "3.3.10750"))) { + GG.dfdyfactors[0] = 1.0; + GG.dfdyfactors[1] = -1.0; + } + /* + if ((strstr(vendor, "Intel"))) { + GG.dfdyfactors[0] = -1.0; + GG.dfdyfactors[1] = 1.0; + } + */ + else { + GG.dfdyfactors[0] = 1.0; + GG.dfdyfactors[1] = 1.0; + } + + GPU_invalid_tex_init(); GPU_simple_shaders_init(); } |