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swrast: Switch the remaining depth readpixels to MapRenderbuffer. 

This avoids the wrapper, which should improve performance on packed
depth/stencil drivers.

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Eric Anholt 2011-10-12 13:39:14 -07:00
parent d072a5f545
commit e887df9bf5
1 changed files with 17 additions and 5 deletions
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22
src/mesa/swrast/s_readpix.c
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@ -103,8 +103,10 @@ read_depth_pixels( struct gl_context *ctx,
const struct gl_pixelstore_attrib *packing )
{
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->_DepthBuffer;
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
GLint j;
GLubyte *dst, *map;
int dstStride, stride;
if (!rb)
return;
@ -120,14 +122,24 @@ read_depth_pixels( struct gl_context *ctx,
if (fast_read_depth_pixels(ctx, x, y, width, height, type, pixels, packing))
return;
dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, 0, 0);
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
&map, &stride);
/* General case (slower) */
for (j = 0; j < height; j++, y++) {
GLfloat depthValues[MAX_WIDTH];
GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, j, 0);
_swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues);
_mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing);
_mesa_unpack_float_z_row(rb->Format, width, map, depthValues);
_mesa_pack_depth_span(ctx, width, dst, type, depthValues, packing);
dst += dstStride;
map += stride;
}
ctx->Driver.UnmapRenderbuffer(ctx, rb);
}