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In _mesa_RenderbufferStorageEXT(), try to avoid needless reallocation.

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Simplify _mesa_GetRenderbufferParameterivEXT() queries.
This commit is contained in:
Brian Paul
2005-11-18 02:24:14 +00:00
parent 948ab5d8a9
commit 311bcf5090
1 changed files with 13 additions and 43 deletions
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44
src/mesa/main/fbobject.c
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@@ -744,6 +744,13 @@ _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
FLUSH_VERTICES(ctx, _NEW_BUFFERS);
if (rb->InternalFormat == internalFormat &&
rb->Width == width &&
rb->Height == height) {
/* no change in allocation needed */
return;
}
/* Now allocate the storage */
ASSERT(rb->AllocStorage);
if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
@@ -802,60 +809,23 @@ _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
*params = ctx->CurrentRenderbuffer->InternalFormat;
return;
case GL_RENDERBUFFER_RED_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
*params = ctx->CurrentRenderbuffer->RedBits;
}
else {
*params = 0;
}
break;
case GL_RENDERBUFFER_GREEN_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
*params = ctx->CurrentRenderbuffer->GreenBits;
}
else {
*params = 0;
}
break;
case GL_RENDERBUFFER_BLUE_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
*params = ctx->CurrentRenderbuffer->BlueBits;
}
else {
*params = 0;
}
break;
case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
*params = ctx->CurrentRenderbuffer->AlphaBits;
}
else {
*params = 0;
}
break;
case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_DEPTH_COMPONENT ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
*params = ctx->CurrentRenderbuffer->DepthBits;
}
else {
*params = 0;
}
break;
case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
if (ctx->CurrentRenderbuffer->_BaseFormat == GL_STENCIL_INDEX ||
ctx->CurrentRenderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
*params = ctx->CurrentRenderbuffer->StencilBits;
}
else {
*params = 0;
}
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetRenderbufferParameterivEXT(target)");