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st/mesa: rename var and update st_choose_format() comments

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This commit is contained in:
Brian Paul
2010-04-27 09:27:00 -06:00
parent a965ef59b5
commit f62c738c62
1 changed files with 53 additions and 47 deletions
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src/mesa/state_tracker/st_format.c
+53 -47
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@@ -389,15 +389,21 @@ default_srgba_format(struct pipe_screen *screen,
/**
* Given an OpenGL internalFormat value for a texture or surface, return
* the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
* This is called during glTexImage2D, for example.
*
* The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
* either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
* we want render-to-texture ability.
*
* \param internalFormat the user value passed to glTexImage2D
* \param target one of PIPE_TEXTURE_x
* \param tex_usage either PIPE_BIND_RENDER_TARGET
* or PIPE_BIND_SAMPLER_VIEW
* \param bindings bitmask of PIPE_BIND_x flags.
*/
enum pipe_format
st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
enum pipe_texture_target target, unsigned tex_usage)
enum pipe_texture_target target, unsigned bindings)
{
unsigned geom_flags = 0;
unsigned geom_flags = 0; /* we don't care about POT vs. NPOT here, yet */
switch (internalFormat) {
case 4:
@@ -405,42 +411,42 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case 3:
case GL_RGB:
return default_rgb_format( screen, target, tex_usage, geom_flags );
return default_rgb_format( screen, target, bindings, geom_flags );
case GL_RGBA16:
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_RGBA4:
case GL_RGBA2:
if (screen->is_format_supported( screen, PIPE_FORMAT_B4G4R4A4_UNORM,
target, tex_usage, geom_flags ))
target, bindings, geom_flags ))
return PIPE_FORMAT_B4G4R4A4_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_RGB5_A1:
if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,
target, tex_usage, geom_flags ))
target, bindings, geom_flags ))
return PIPE_FORMAT_B5G5R5A1_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
return default_rgb_format( screen, target, tex_usage, geom_flags );
return default_rgb_format( screen, target, bindings, geom_flags );
case GL_RGB5:
case GL_RGB4:
case GL_R3_G3_B2:
if (screen->is_format_supported( screen, PIPE_FORMAT_B5G6R5_UNORM,
target, tex_usage, geom_flags ))
target, bindings, geom_flags ))
return PIPE_FORMAT_B5G6R5_UNORM;
if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,
target, tex_usage, geom_flags ))
target, bindings, geom_flags ))
return PIPE_FORMAT_B5G5R5A1_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_ALPHA:
case GL_ALPHA4:
@@ -449,9 +455,9 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_ALPHA16:
case GL_COMPRESSED_ALPHA:
if (screen->is_format_supported( screen, PIPE_FORMAT_A8_UNORM, target,
tex_usage, geom_flags ))
bindings, geom_flags ))
return PIPE_FORMAT_A8_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case 1:
case GL_LUMINANCE:
@@ -461,9 +467,9 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_LUMINANCE16:
case GL_COMPRESSED_LUMINANCE:
if (screen->is_format_supported( screen, PIPE_FORMAT_L8_UNORM, target,
tex_usage, geom_flags ))
bindings, geom_flags ))
return PIPE_FORMAT_L8_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case 2:
case GL_LUMINANCE_ALPHA:
@@ -475,9 +481,9 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_LUMINANCE16_ALPHA16:
case GL_COMPRESSED_LUMINANCE_ALPHA:
if (screen->is_format_supported( screen, PIPE_FORMAT_L8A8_UNORM, target,
tex_usage, geom_flags ))
bindings, geom_flags ))
return PIPE_FORMAT_L8A8_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_INTENSITY:
case GL_INTENSITY4:
@@ -486,53 +492,53 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_INTENSITY16:
case GL_COMPRESSED_INTENSITY:
if (screen->is_format_supported( screen, PIPE_FORMAT_I8_UNORM, target,
tex_usage, geom_flags ))
bindings, geom_flags ))
return PIPE_FORMAT_I8_UNORM;
return default_rgba_format( screen, target, tex_usage, geom_flags );
return default_rgba_format( screen, target, bindings, geom_flags );
case GL_YCBCR_MESA:
if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY,
target, tex_usage, geom_flags)) {
target, bindings, geom_flags)) {
return PIPE_FORMAT_UYVY;
}
if (screen->is_format_supported(screen, PIPE_FORMAT_YUYV,
target, tex_usage, geom_flags)) {
target, bindings, geom_flags)) {
return PIPE_FORMAT_YUYV;
}
return PIPE_FORMAT_NONE;
case GL_COMPRESSED_RGB:
/* can only sample from compressed formats */
if (tex_usage & ~PIPE_BIND_SAMPLER_VIEW)
if (bindings & ~PIPE_BIND_SAMPLER_VIEW)
return PIPE_FORMAT_NONE;
else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT1_RGB;
else
return default_rgb_format(screen, target, tex_usage, geom_flags);
return default_rgb_format(screen, target, bindings, geom_flags);
case GL_COMPRESSED_RGBA:
/* can only sample from compressed formats */
if (tex_usage & ~PIPE_BIND_SAMPLER_VIEW)
if (bindings & ~PIPE_BIND_SAMPLER_VIEW)
return PIPE_FORMAT_NONE;
else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT3_RGBA;
else
return default_rgba_format(screen, target, tex_usage, geom_flags);
return default_rgba_format(screen, target, bindings, geom_flags);
case GL_RGB_S3TC:
case GL_RGB4_S3TC:
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT1_RGB;
else
return PIPE_FORMAT_NONE;
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGBA,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT1_RGBA;
else
return PIPE_FORMAT_NONE;
@@ -541,14 +547,14 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_RGBA4_S3TC:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT3_RGBA;
else
return PIPE_FORMAT_NONE;
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_DXT5_RGBA;
else
return PIPE_FORMAT_NONE;
@@ -562,20 +568,20 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_DEPTH_COMPONENT16:
if (screen->is_format_supported(screen, PIPE_FORMAT_Z16_UNORM, target,
tex_usage, geom_flags))
bindings, geom_flags))
return PIPE_FORMAT_Z16_UNORM;
/* fall-through */
case GL_DEPTH_COMPONENT24:
if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
/* fall-through */
case GL_DEPTH_COMPONENT32:
if (screen->is_format_supported(screen, PIPE_FORMAT_Z32_UNORM,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_Z32_UNORM;
/* fall-through */
case GL_DEPTH_COMPONENT:
@@ -587,7 +593,7 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
PIPE_FORMAT_S8_USCALED_Z24_UNORM
};
return find_supported_format(screen, formats, Elements(formats),
target, tex_usage, geom_flags);
target, bindings, geom_flags);
}
case GL_STENCIL_INDEX:
@@ -602,7 +608,7 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
PIPE_FORMAT_S8_USCALED_Z24_UNORM
};
return find_supported_format(screen, formats, Elements(formats),
target, tex_usage, geom_flags);
target, bindings, geom_flags);
}
case GL_DEPTH_STENCIL_EXT:
@@ -613,7 +619,7 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
PIPE_FORMAT_S8_USCALED_Z24_UNORM
};
return find_supported_format(screen, formats, Elements(formats),
target, tex_usage, geom_flags);
target, bindings, geom_flags);
}
case GL_SRGB_EXT:
@@ -622,7 +628,7 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_COMPRESSED_SRGB_ALPHA_EXT:
case GL_SRGB_ALPHA_EXT:
case GL_SRGB8_ALPHA8_EXT:
return default_srgba_format( screen, target, tex_usage, geom_flags );
return default_srgba_format( screen, target, bindings, geom_flags );
case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
return PIPE_FORMAT_DXT1_SRGB;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
@@ -637,16 +643,16 @@ st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
case GL_COMPRESSED_SLUMINANCE_EXT:
case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_L8A8_SRGB,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_L8A8_SRGB;
return default_srgba_format( screen, target, tex_usage, geom_flags );
return default_srgba_format( screen, target, bindings, geom_flags );
case GL_SLUMINANCE_EXT:
case GL_SLUMINANCE8_EXT:
if (screen->is_format_supported(screen, PIPE_FORMAT_L8_SRGB,
target, tex_usage, geom_flags))
target, bindings, geom_flags))
return PIPE_FORMAT_L8_SRGB;
return default_srgba_format( screen, target, tex_usage, geom_flags );
return default_srgba_format( screen, target, bindings, geom_flags );
default:
return PIPE_FORMAT_NONE;