Commit 135fe907 authored by Marek Olšák's avatar Marek Olšák

mesa: move some helper functions from fboobject.c to glformats.c

Reviewed-by: default avatarBrian Paul <brianp@vmware.com>
parent 0fda2e91
......@@ -2716,127 +2716,16 @@ compatible_color_datatypes(gl_format srcFormat, gl_format dstFormat)
}
/**
* Return the equivalent non-generic internal format.
* This is useful for comparing whether two internal formats are semantically
* equivalent.
*/
static GLenum
get_nongeneric_internalformat(GLenum format)
{
switch (format) {
/* GL 1.1 formats. */
case 4:
case GL_RGBA:
return GL_RGBA8;
case 3:
case GL_RGB:
return GL_RGB8;
case 2:
case GL_LUMINANCE_ALPHA:
return GL_LUMINANCE8_ALPHA8;
case 1:
case GL_LUMINANCE:
return GL_LUMINANCE8;
case GL_ALPHA:
return GL_ALPHA8;
case GL_INTENSITY:
return GL_INTENSITY8;
/* GL_ARB_texture_rg */
case GL_RED:
return GL_R8;
case GL_RG:
return GL_RG8;
/* GL_EXT_texture_sRGB */
case GL_SRGB:
return GL_SRGB8;
case GL_SRGB_ALPHA:
return GL_SRGB8_ALPHA8;
case GL_SLUMINANCE:
return GL_SLUMINANCE8;
case GL_SLUMINANCE_ALPHA:
return GL_SLUMINANCE8_ALPHA8;
/* GL_EXT_texture_snorm */
case GL_RGBA_SNORM:
return GL_RGBA8_SNORM;
case GL_RGB_SNORM:
return GL_RGB8_SNORM;
case GL_RG_SNORM:
return GL_RG8_SNORM;
case GL_RED_SNORM:
return GL_R8_SNORM;
case GL_LUMINANCE_ALPHA_SNORM:
return GL_LUMINANCE8_ALPHA8_SNORM;
case GL_LUMINANCE_SNORM:
return GL_LUMINANCE8_SNORM;
case GL_ALPHA_SNORM:
return GL_ALPHA8_SNORM;
case GL_INTENSITY_SNORM:
return GL_INTENSITY8_SNORM;
default:
return format;
}
}
static GLenum
get_linear_internalformat(GLenum format)
{
switch (format) {
case GL_SRGB:
return GL_RGB;
case GL_SRGB_ALPHA:
return GL_RGBA;
case GL_SRGB8:
return GL_RGB8;
case GL_SRGB8_ALPHA8:
return GL_RGBA8;
case GL_SLUMINANCE:
return GL_LUMINANCE8;
case GL_SLUMINANCE_ALPHA:
return GL_LUMINANCE8_ALPHA8;
default:
return format;
}
}
static GLboolean
compatible_resolve_formats(const struct gl_renderbuffer *colorReadRb,
const struct gl_renderbuffer *colorDrawRb)
compatible_resolve_formats(const struct gl_renderbuffer *readRb,
const struct gl_renderbuffer *drawRb)
{
GLenum readFormat, drawFormat;
/* The simple case where we know the backing Mesa formats are the same.
*/
if (_mesa_get_srgb_format_linear(colorReadRb->Format) ==
_mesa_get_srgb_format_linear(colorDrawRb->Format)) {
if (_mesa_get_srgb_format_linear(readRb->Format) ==
_mesa_get_srgb_format_linear(drawRb->Format)) {
return GL_TRUE;
}
......@@ -2850,10 +2739,10 @@ compatible_resolve_formats(const struct gl_renderbuffer *colorReadRb,
*
* Blits between linear and sRGB formats are also allowed.
*/
readFormat = get_nongeneric_internalformat(colorReadRb->InternalFormat);
drawFormat = get_nongeneric_internalformat(colorDrawRb->InternalFormat);
readFormat = get_linear_internalformat(readFormat);
drawFormat = get_linear_internalformat(drawFormat);
readFormat = _mesa_get_nongeneric_internalformat(readRb->InternalFormat);
drawFormat = _mesa_get_nongeneric_internalformat(drawRb->InternalFormat);
readFormat = _mesa_get_linear_internalformat(readFormat);
drawFormat = _mesa_get_linear_internalformat(drawFormat);
if (readFormat == drawFormat) {
return GL_TRUE;
......
......@@ -1007,6 +1007,119 @@ _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
}
/**
* Return the equivalent non-generic internal format.
* This is useful for comparing whether two internal formats are equivalent.
*/
GLenum
_mesa_get_nongeneric_internalformat(GLenum format)
{
switch (format) {
/* GL 1.1 formats. */
case 4:
case GL_RGBA:
return GL_RGBA8;
case 3:
case GL_RGB:
return GL_RGB8;
case 2:
case GL_LUMINANCE_ALPHA:
return GL_LUMINANCE8_ALPHA8;
case 1:
case GL_LUMINANCE:
return GL_LUMINANCE8;
case GL_ALPHA:
return GL_ALPHA8;
case GL_INTENSITY:
return GL_INTENSITY8;
/* GL_ARB_texture_rg */
case GL_RED:
return GL_R8;
case GL_RG:
return GL_RG8;
/* GL_EXT_texture_sRGB */
case GL_SRGB:
return GL_SRGB8;
case GL_SRGB_ALPHA:
return GL_SRGB8_ALPHA8;
case GL_SLUMINANCE:
return GL_SLUMINANCE8;
case GL_SLUMINANCE_ALPHA:
return GL_SLUMINANCE8_ALPHA8;
/* GL_EXT_texture_snorm */
case GL_RGBA_SNORM:
return GL_RGBA8_SNORM;
case GL_RGB_SNORM:
return GL_RGB8_SNORM;
case GL_RG_SNORM:
return GL_RG8_SNORM;
case GL_RED_SNORM:
return GL_R8_SNORM;
case GL_LUMINANCE_ALPHA_SNORM:
return GL_LUMINANCE8_ALPHA8_SNORM;
case GL_LUMINANCE_SNORM:
return GL_LUMINANCE8_SNORM;
case GL_ALPHA_SNORM:
return GL_ALPHA8_SNORM;
case GL_INTENSITY_SNORM:
return GL_INTENSITY8_SNORM;
default:
return format;
}
}
/**
* Convert an sRGB internal format to linear.
*/
GLenum
_mesa_get_linear_internalformat(GLenum format)
{
switch (format) {
case GL_SRGB:
return GL_RGB;
case GL_SRGB_ALPHA:
return GL_RGBA;
case GL_SRGB8:
return GL_RGB8;
case GL_SRGB8_ALPHA8:
return GL_RGBA8;
case GL_SLUMINANCE:
return GL_LUMINANCE8;
case GL_SLUMINANCE_ALPHA:
return GL_LUMINANCE8_ALPHA8;
default:
return format;
}
}
/**
* Do error checking of format/type combinations for glReadPixels,
* glDrawPixels and glTex[Sub]Image. Note that depending on the format
......
......@@ -94,6 +94,12 @@ _mesa_base_format_has_channel(GLenum base_format, GLenum pname);
extern GLenum
_mesa_generic_compressed_format_to_uncompressed_format(GLenum format);
extern GLenum
_mesa_get_nongeneric_internalformat(GLenum format);
extern GLenum
_mesa_get_linear_internalformat(GLenum format);
extern GLenum
_mesa_error_check_format_and_type(const struct gl_context *ctx,
GLenum format, GLenum type);
......
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