mesa: move some helper functions from fboobject.c to glformats.c
Reviewed-by: Brian Paul <brianp@vmware.com>
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0fda2e9147
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135fe907a0
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@ -2716,127 +2716,16 @@ compatible_color_datatypes(gl_format srcFormat, gl_format dstFormat)
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}
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/**
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* Return the equivalent non-generic internal format.
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* This is useful for comparing whether two internal formats are semantically
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* equivalent.
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*/
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static GLenum
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get_nongeneric_internalformat(GLenum format)
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{
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switch (format) {
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/* GL 1.1 formats. */
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case 4:
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case GL_RGBA:
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return GL_RGBA8;
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case 3:
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case GL_RGB:
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return GL_RGB8;
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case 2:
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case GL_LUMINANCE_ALPHA:
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return GL_LUMINANCE8_ALPHA8;
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case 1:
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case GL_LUMINANCE:
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return GL_LUMINANCE8;
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case GL_ALPHA:
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return GL_ALPHA8;
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case GL_INTENSITY:
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return GL_INTENSITY8;
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/* GL_ARB_texture_rg */
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case GL_RED:
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return GL_R8;
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case GL_RG:
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return GL_RG8;
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/* GL_EXT_texture_sRGB */
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case GL_SRGB:
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return GL_SRGB8;
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case GL_SRGB_ALPHA:
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return GL_SRGB8_ALPHA8;
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case GL_SLUMINANCE:
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return GL_SLUMINANCE8;
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case GL_SLUMINANCE_ALPHA:
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return GL_SLUMINANCE8_ALPHA8;
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/* GL_EXT_texture_snorm */
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case GL_RGBA_SNORM:
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return GL_RGBA8_SNORM;
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case GL_RGB_SNORM:
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return GL_RGB8_SNORM;
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case GL_RG_SNORM:
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return GL_RG8_SNORM;
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case GL_RED_SNORM:
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return GL_R8_SNORM;
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case GL_LUMINANCE_ALPHA_SNORM:
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return GL_LUMINANCE8_ALPHA8_SNORM;
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case GL_LUMINANCE_SNORM:
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return GL_LUMINANCE8_SNORM;
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case GL_ALPHA_SNORM:
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return GL_ALPHA8_SNORM;
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case GL_INTENSITY_SNORM:
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return GL_INTENSITY8_SNORM;
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default:
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return format;
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}
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}
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static GLenum
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get_linear_internalformat(GLenum format)
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{
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switch (format) {
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case GL_SRGB:
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return GL_RGB;
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case GL_SRGB_ALPHA:
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return GL_RGBA;
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case GL_SRGB8:
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return GL_RGB8;
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case GL_SRGB8_ALPHA8:
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return GL_RGBA8;
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case GL_SLUMINANCE:
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return GL_LUMINANCE8;
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case GL_SLUMINANCE_ALPHA:
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return GL_LUMINANCE8_ALPHA8;
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default:
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return format;
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}
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}
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static GLboolean
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compatible_resolve_formats(const struct gl_renderbuffer *colorReadRb,
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const struct gl_renderbuffer *colorDrawRb)
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compatible_resolve_formats(const struct gl_renderbuffer *readRb,
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const struct gl_renderbuffer *drawRb)
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{
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GLenum readFormat, drawFormat;
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/* The simple case where we know the backing Mesa formats are the same.
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*/
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if (_mesa_get_srgb_format_linear(colorReadRb->Format) ==
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_mesa_get_srgb_format_linear(colorDrawRb->Format)) {
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if (_mesa_get_srgb_format_linear(readRb->Format) ==
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_mesa_get_srgb_format_linear(drawRb->Format)) {
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return GL_TRUE;
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}
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@ -2850,10 +2739,10 @@ compatible_resolve_formats(const struct gl_renderbuffer *colorReadRb,
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*
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* Blits between linear and sRGB formats are also allowed.
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*/
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readFormat = get_nongeneric_internalformat(colorReadRb->InternalFormat);
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drawFormat = get_nongeneric_internalformat(colorDrawRb->InternalFormat);
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readFormat = get_linear_internalformat(readFormat);
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drawFormat = get_linear_internalformat(drawFormat);
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readFormat = _mesa_get_nongeneric_internalformat(readRb->InternalFormat);
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drawFormat = _mesa_get_nongeneric_internalformat(drawRb->InternalFormat);
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readFormat = _mesa_get_linear_internalformat(readFormat);
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drawFormat = _mesa_get_linear_internalformat(drawFormat);
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if (readFormat == drawFormat) {
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return GL_TRUE;
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@ -1007,6 +1007,119 @@ _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
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}
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/**
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* Return the equivalent non-generic internal format.
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* This is useful for comparing whether two internal formats are equivalent.
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*/
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GLenum
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_mesa_get_nongeneric_internalformat(GLenum format)
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{
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switch (format) {
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/* GL 1.1 formats. */
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case 4:
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case GL_RGBA:
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return GL_RGBA8;
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case 3:
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case GL_RGB:
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return GL_RGB8;
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case 2:
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case GL_LUMINANCE_ALPHA:
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return GL_LUMINANCE8_ALPHA8;
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case 1:
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case GL_LUMINANCE:
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return GL_LUMINANCE8;
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case GL_ALPHA:
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return GL_ALPHA8;
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case GL_INTENSITY:
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return GL_INTENSITY8;
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/* GL_ARB_texture_rg */
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case GL_RED:
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return GL_R8;
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case GL_RG:
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return GL_RG8;
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/* GL_EXT_texture_sRGB */
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case GL_SRGB:
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return GL_SRGB8;
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case GL_SRGB_ALPHA:
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return GL_SRGB8_ALPHA8;
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case GL_SLUMINANCE:
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return GL_SLUMINANCE8;
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case GL_SLUMINANCE_ALPHA:
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return GL_SLUMINANCE8_ALPHA8;
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/* GL_EXT_texture_snorm */
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case GL_RGBA_SNORM:
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return GL_RGBA8_SNORM;
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case GL_RGB_SNORM:
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return GL_RGB8_SNORM;
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case GL_RG_SNORM:
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return GL_RG8_SNORM;
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case GL_RED_SNORM:
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return GL_R8_SNORM;
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case GL_LUMINANCE_ALPHA_SNORM:
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return GL_LUMINANCE8_ALPHA8_SNORM;
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case GL_LUMINANCE_SNORM:
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return GL_LUMINANCE8_SNORM;
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case GL_ALPHA_SNORM:
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return GL_ALPHA8_SNORM;
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case GL_INTENSITY_SNORM:
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return GL_INTENSITY8_SNORM;
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default:
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return format;
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}
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}
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/**
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* Convert an sRGB internal format to linear.
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*/
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GLenum
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_mesa_get_linear_internalformat(GLenum format)
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{
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switch (format) {
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case GL_SRGB:
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return GL_RGB;
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case GL_SRGB_ALPHA:
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return GL_RGBA;
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case GL_SRGB8:
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return GL_RGB8;
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case GL_SRGB8_ALPHA8:
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return GL_RGBA8;
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case GL_SLUMINANCE:
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return GL_LUMINANCE8;
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case GL_SLUMINANCE_ALPHA:
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return GL_LUMINANCE8_ALPHA8;
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default:
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return format;
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}
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}
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/**
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* Do error checking of format/type combinations for glReadPixels,
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* glDrawPixels and glTex[Sub]Image. Note that depending on the format
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@ -94,6 +94,12 @@ _mesa_base_format_has_channel(GLenum base_format, GLenum pname);
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extern GLenum
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_mesa_generic_compressed_format_to_uncompressed_format(GLenum format);
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extern GLenum
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_mesa_get_nongeneric_internalformat(GLenum format);
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extern GLenum
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_mesa_get_linear_internalformat(GLenum format);
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extern GLenum
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_mesa_error_check_format_and_type(const struct gl_context *ctx,
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GLenum format, GLenum type);
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