diff options
Diffstat (limited to 'src/mesa/swrast/s_imaging.c')
| -rw-r--r-- | src/mesa/swrast/s_imaging.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/src/mesa/swrast/s_imaging.c b/src/mesa/swrast/s_imaging.c index 088215d535..5c79a7ba95 100644 --- a/src/mesa/swrast/s_imaging.c +++ b/src/mesa/swrast/s_imaging.c @@ -41,6 +41,11 @@ _swrast_CopyColorTable( GLcontext *ctx, GLchan data[MAX_WIDTH][4]; struct gl_buffer_object *bufferSave; + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* no readbuffer - OK */ + return; + } + /* Select buffer to read from */ _swrast_use_read_buffer(ctx); @@ -48,7 +53,8 @@ _swrast_CopyColorTable( GLcontext *ctx, width = MAX_WIDTH; /* read the data from framebuffer */ - _swrast_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data ); + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, data ); /* Restore reading from draw buffer (the default) */ _swrast_use_draw_buffer(ctx); @@ -71,6 +77,11 @@ _swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start, GLchan data[MAX_WIDTH][4]; struct gl_buffer_object *bufferSave; + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* no readbuffer - OK */ + return; + } + /* Select buffer to read from */ _swrast_use_read_buffer(ctx); @@ -78,7 +89,8 @@ _swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start, width = MAX_WIDTH; /* read the data from framebuffer */ - _swrast_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data ); + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, data ); /* Restore reading from draw buffer (the default) */ _swrast_use_draw_buffer(ctx); @@ -103,14 +115,19 @@ _swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target, GLchan rgba[MAX_CONVOLUTION_WIDTH][4]; struct gl_buffer_object *bufferSave; + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* no readbuffer - OK */ + return; + } + /* Select buffer to read from */ _swrast_use_read_buffer(ctx); RENDER_START( swrast, ctx ); /* read the data from framebuffer */ - _swrast_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, - (GLchan (*)[4]) rgba ); + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y, (GLchan (*)[4]) rgba ); RENDER_FINISH( swrast, ctx ); @@ -141,6 +158,11 @@ _swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target, GLint i; struct gl_buffer_object *bufferSave; + if (!ctx->ReadBuffer->_ColorReadBuffer) { + /* no readbuffer - OK */ + return; + } + /* Select buffer to read from */ _swrast_use_read_buffer(ctx); @@ -148,8 +170,8 @@ _swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target, /* read pixels from framebuffer */ for (i = 0; i < height; i++) { - _swrast_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i, - (GLchan (*)[4]) rgba[i] ); + _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer, + width, x, y + i, (GLchan (*)[4]) rgba[i] ); } RENDER_FINISH(swrast,ctx); |