diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_drawpixels.c | 90 |
1 files changed, 36 insertions, 54 deletions
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c index 43dc8d1b83..7c611cb4ec 100644 --- a/src/mesa/state_tracker/st_cb_drawpixels.c +++ b/src/mesa/state_tracker/st_cb_drawpixels.c @@ -938,39 +938,13 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, enum pipe_format srcFormat, texFormat; int ptw, pth; GLboolean invertTex = GL_FALSE; + GLint readX, readY, readW, readH; + struct gl_pixelstore_attrib unpack = ctx->DefaultPacking; pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL); st_validate_state(st); - if (srcx < 0) { - width -= -srcx; - dstx += -srcx; - srcx = 0; - } - - if (srcy < 0) { - height -= -srcy; - dsty += -srcy; - srcy = 0; - } - - if (dstx < 0) { - width -= -dstx; - srcx += -dstx; - dstx = 0; - } - - if (dsty < 0) { - height -= -dsty; - srcy += -dsty; - dsty = 0; - } - - if (width < 0 || height < 0) - return; - - if (type == GL_STENCIL) { /* can't use texturing to do stencil */ copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); @@ -1003,7 +977,7 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT, PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_DEPTH_STENCIL); - assert(texFormat != PIPE_FORMAT_NONE); /* XXX no depth texture formats??? */ + assert(texFormat != PIPE_FORMAT_NONE); } else { /* default color format */ @@ -1013,20 +987,26 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, } } + /* Invert src region if needed */ if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { srcy = ctx->ReadBuffer->Height - srcy - height; - - if (srcy < 0) { - height -= -srcy; - srcy = 0; - } - - if (height < 0) - return; - invertTex = !invertTex; } + /* Clip the read region against the src buffer bounds. + * We'll still allocate a temporary buffer/texture for the original + * src region size but we'll only read the region which is on-screen. + * This may mean that we draw garbage pixels into the dest region, but + * that's expected. + */ + readX = srcx; + readY = srcy; + readW = width; + readH = height; + _mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &unpack); + readW = MAX2(0, readW); + readH = MAX2(0, readH); + /* Need to use POT texture? */ ptw = width; pth = height; @@ -1055,7 +1035,6 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, return; /* Make temporary texture which is a copy of the src region. - * We'll draw a quad with this texture to draw the dest image. */ if (srcFormat == texFormat) { /* copy source framebuffer surface into mipmap/texture */ @@ -1066,16 +1045,16 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, PIPE_BUFFER_USAGE_GPU_WRITE ); if (pipe->surface_copy) { pipe->surface_copy(pipe, - psTex, /* dest */ - 0, 0, /* destx/y */ - psRead, - srcx, srcy, width, height); + psTex, /* dest surf */ + unpack.SkipPixels, unpack.SkipRows, /* dest pos */ + psRead, /* src surf */ + readX, readY, readW, readH); /* src region */ } else { util_surface_copy(pipe, FALSE, psTex, - 0, 0, + unpack.SkipPixels, unpack.SkipRows, psRead, - srcx, srcy, width, height); + readX, readY, readW, readH); } if (0) { @@ -1091,8 +1070,8 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, /* CPU-based fallback/conversion */ struct pipe_transfer *ptRead = st_cond_flush_get_tex_transfer(st, rbRead->texture, 0, 0, 0, - PIPE_TRANSFER_READ, srcx, srcy, width, - height); + PIPE_TRANSFER_READ, + readX, readY, readW, readH); struct pipe_transfer *ptTex; enum pipe_transfer_usage transfer_usage; @@ -1107,20 +1086,21 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, ptTex = st_cond_flush_get_tex_transfer(st, pt, 0, 0, 0, transfer_usage, 0, 0, width, height); + /* copy image from ptRead surface to ptTex surface */ if (type == GL_COLOR) { /* alternate path using get/put_tile() */ GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - - pipe_get_tile_rgba(ptRead, 0, 0, width, height, buf); - pipe_put_tile_rgba(ptTex, 0, 0, width, height, buf); - + pipe_get_tile_rgba(ptRead, readX, readY, readW, readH, buf); + pipe_put_tile_rgba(ptTex, unpack.SkipPixels, unpack.SkipRows, + readW, readH, buf); free(buf); } else { /* GL_DEPTH */ GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint)); - pipe_get_tile_z(ptRead, 0, 0, width, height, buf); - pipe_put_tile_z(ptTex, 0, 0, width, height, buf); + pipe_get_tile_z(ptRead, readX, readY, readW, readH, buf); + pipe_put_tile_z(ptTex, unpack.SkipPixels, unpack.SkipRows, + readW, readH, buf); free(buf); } @@ -1128,7 +1108,9 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, screen->tex_transfer_destroy(ptTex); } - /* draw textured quad */ + /* OK, the texture 'pt' contains the src image/pixels. Now draw a + * textured quad with that texture. + */ draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, pt, |