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mesa: Fall back to float16 if float32 isn't supported in ChooseTexFormat.

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Until GL 3.0, there isn't any requirement on the actual sizes of
channels chosen.  By falling back to 16 here, we can correctly support
ARB_texture_float on original i965 hardware, which can't correctly
filter 32-bit floats.
This commit is contained in:
Eric Anholt 2011-11-22 13:27:54 -08:00
parent babe26b3ef
commit 6216a5b495
1 changed files with 11 additions and 0 deletions
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11
src/mesa/main/texformat.c
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@ -326,6 +326,8 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
case GL_ALPHA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_LUMINANCE16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
@ -335,6 +337,8 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
case GL_LUMINANCE32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_LUMINANCE_ALPHA16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
@ -344,6 +348,8 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
case GL_LUMINANCE_ALPHA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_INTENSITY16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
@ -353,6 +359,8 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
case GL_INTENSITY32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_RGB16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
@ -363,6 +371,8 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
case GL_RGB32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
case GL_RGBA16F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
@ -370,6 +380,7 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
break;
case GL_RGBA32F_ARB:
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
break;
default:
; /* fallthrough */