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gallium: use PIPE_TEXTURE_USAGE_RENDER_TARGET for stencil renderbuffers

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This commit is contained in:
Brian Paul 2008-08-18 16:30:10 -06:00
parent a88de345cd
commit c71161f1b1
1 changed files with 26 additions and 2 deletions
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28
src/mesa/state_tracker/st_format.c
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@ -342,6 +342,9 @@ default_depth_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.
* \param target one of PIPE_TEXTURE_x
* \param tex_usage either PIPE_TEXTURE_USAGE_RENDER_TARGET
* or PIPE_TEXTURE_USAGE_SAMPLER
*/
enum pipe_format
st_choose_format(struct pipe_context *pipe, GLint internalFormat,
@ -515,14 +518,35 @@ st_choose_format(struct pipe_context *pipe, GLint internalFormat,
}
static GLboolean
is_stencil_format(GLenum format)
{
switch (format) {
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1_EXT:
case GL_STENCIL_INDEX4_EXT:
case GL_STENCIL_INDEX8_EXT:
case GL_STENCIL_INDEX16_EXT:
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
*/
enum pipe_format
st_choose_renderbuffer_format(struct pipe_context *pipe, GLint internalFormat)
{
return st_choose_format(pipe, internalFormat, PIPE_TEXTURE_2D,
PIPE_TEXTURE_USAGE_RENDER_TARGET);
uint usage;
if (is_stencil_format(internalFormat))
usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
else
usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
return st_choose_format(pipe, internalFormat, PIPE_TEXTURE_2D, usage);
}