diff options
author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-05-06 13:47:41 -0600 |
---|---|---|
committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-05-06 13:48:27 -0600 |
commit | 296378b6c8b205048244746e260739448c4ee590 (patch) | |
tree | 3c3e53ef0e9f47495ce6281633e1ed1324d31859 /src/mesa/state_tracker/st_cb_readpixels.c | |
parent | 973d0c014dba87308e358291de0730d38d50a733 (diff) |
gallium: create drawing surfaces as GPU_READ/WRITE only
Create different temporary surfaces for CPU_READ/WRITE when needed (such as
for glReadPixels, glAccum, some glCopy/DrawPixels, glCopyTexSubImage, etc).
Diffstat (limited to 'src/mesa/state_tracker/st_cb_readpixels.c')
-rw-r--r-- | src/mesa/state_tracker/st_cb_readpixels.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/src/mesa/state_tracker/st_cb_readpixels.c b/src/mesa/state_tracker/st_cb_readpixels.c index e242195e7a..0b2b9d544d 100644 --- a/src/mesa/state_tracker/st_cb_readpixels.c +++ b/src/mesa/state_tracker/st_cb_readpixels.c @@ -63,10 +63,14 @@ st_read_stencil_pixels(GLcontext *ctx, GLint x, GLint y, struct gl_framebuffer *fb = ctx->ReadBuffer; struct pipe_screen *screen = ctx->st->pipe->screen; struct st_renderbuffer *strb = st_renderbuffer(fb->_StencilBuffer); - struct pipe_surface *ps = strb->surface; + struct pipe_surface *ps; ubyte *stmap; GLint j; + /* Create a CPU-READ surface/view into the renderbuffer's texture */ + ps = screen->get_tex_surface(screen, strb->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_READ); + /* map the stencil buffer */ stmap = screen->surface_map(screen, ps, PIPE_BUFFER_USAGE_CPU_READ); @@ -126,6 +130,7 @@ st_read_stencil_pixels(GLcontext *ctx, GLint x, GLint y, /* unmap the stencil buffer */ screen->surface_unmap(screen, ps); + pipe_surface_reference(&ps, NULL); } @@ -169,12 +174,14 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLvoid *dest) { struct pipe_context *pipe = ctx->st->pipe; + struct pipe_screen *screen = pipe->screen; GLfloat temp[MAX_WIDTH][4]; const GLbitfield transferOps = ctx->_ImageTransferState; GLint i, yStep, dfStride; GLfloat *df; struct st_renderbuffer *strb; struct gl_pixelstore_attrib clippedPacking = *pack; + struct pipe_surface *surf; /* XXX convolution not done yet */ assert((transferOps & IMAGE_CONVOLUTION_BIT) == 0); @@ -230,6 +237,10 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, yStep = 1; } + /* Create a CPU-READ surface/view into the renderbuffer's texture */ + surf = screen->get_tex_surface(screen, strb->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_READ); + /* * Copy pixels from pipe_surface to user memory */ @@ -241,15 +252,14 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, const GLint dstStride = _mesa_image_row_stride(&clippedPacking, width, format, type); - if (strb->surface->format == PIPE_FORMAT_S8Z24_UNORM || - strb->surface->format == PIPE_FORMAT_X8Z24_UNORM) { + if (surf->format == PIPE_FORMAT_S8Z24_UNORM || + surf->format == PIPE_FORMAT_X8Z24_UNORM) { if (format == GL_DEPTH_COMPONENT) { for (i = 0; i < height; i++) { GLuint ztemp[MAX_WIDTH], j; GLfloat zfloat[MAX_WIDTH]; const double scale = 1.0 / ((1 << 24) - 1); - pipe_get_tile_raw(pipe, strb->surface, x, y, - width, 1, ztemp, 0); + pipe_get_tile_raw(pipe, surf, x, y, width, 1, ztemp, 0); y += yStep; for (j = 0; j < width; j++) { zfloat[j] = (float) (scale * (ztemp[j] & 0xffffff)); @@ -263,18 +273,18 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, /* untested, but simple: */ assert(format == GL_DEPTH_STENCIL_EXT); for (i = 0; i < height; i++) { - pipe_get_tile_raw(pipe, strb->surface, x, y, width, 1, dst, 0); + pipe_get_tile_raw(pipe, surf, x, y, width, 1, dst, 0); y += yStep; dst += dstStride; } } } - else if (strb->surface->format == PIPE_FORMAT_Z16_UNORM) { + else if (surf->format == PIPE_FORMAT_Z16_UNORM) { for (i = 0; i < height; i++) { GLushort ztemp[MAX_WIDTH], j; GLfloat zfloat[MAX_WIDTH]; const double scale = 1.0 / 0xffff; - pipe_get_tile_raw(pipe, strb->surface, x, y, width, 1, ztemp, 0); + pipe_get_tile_raw(pipe, surf, x, y, width, 1, ztemp, 0); y += yStep; for (j = 0; j < width; j++) { zfloat[j] = (float) (scale * ztemp[j]); @@ -284,12 +294,12 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, dst += dstStride; } } - else if (strb->surface->format == PIPE_FORMAT_Z32_UNORM) { + else if (surf->format == PIPE_FORMAT_Z32_UNORM) { for (i = 0; i < height; i++) { GLuint ztemp[MAX_WIDTH], j; GLfloat zfloat[MAX_WIDTH]; const double scale = 1.0 / 0xffffffff; - pipe_get_tile_raw(pipe, strb->surface, x, y, width, 1, ztemp, 0); + pipe_get_tile_raw(pipe, surf, x, y, width, 1, ztemp, 0); y += yStep; for (j = 0; j < width; j++) { zfloat[j] = (float) (scale * ztemp[j]); @@ -303,7 +313,7 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, /* RGBA format */ /* Do a row at a time to flip image data vertically */ for (i = 0; i < height; i++) { - pipe_get_tile_rgba(pipe, strb->surface, x, y, width, 1, df); + pipe_get_tile_rgba(pipe, surf, x, y, width, 1, df); y += yStep; df += dfStride; if (!dfStride) { @@ -315,6 +325,8 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, } } + pipe_surface_reference(&surf, NULL); + _mesa_unmap_readpix_pbo(ctx, &clippedPacking); } |