diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_fbo.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_cb_fbo.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_cb_fbo.c b/mesalib/src/mesa/state_tracker/st_cb_fbo.c index e04cb4406..a351d1197 100644 --- a/mesalib/src/mesa/state_tracker/st_cb_fbo.c +++ b/mesalib/src/mesa/state_tracker/st_cb_fbo.c @@ -355,8 +355,12 @@ st_render_texture(struct gl_context *ctx, /* get pointer to texture image we're rendeing to */ texImage = _mesa_get_attachment_teximage(att); - /* create new renderbuffer which wraps the texture image */ - rb = st_new_renderbuffer(ctx, 0); + /* create new renderbuffer which wraps the texture image. + * Use the texture's name as the renderbuffer's name so that we have + * something that's non-zero (to determine vertical orientation) and + * possibly helpful for debugging. + */ + rb = st_new_renderbuffer(ctx, att->Texture->Name); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()"); return; @@ -644,7 +648,9 @@ st_MapRenderbuffer(struct gl_context *ctx, struct st_context *st = st_context(ctx); struct st_renderbuffer *strb = st_renderbuffer(rb); struct pipe_context *pipe = st->pipe; + const GLboolean invert = rb->Name == 0; unsigned usage; + GLuint y2; usage = 0x0; if (mode & GL_MAP_READ_BIT) @@ -652,14 +658,30 @@ st_MapRenderbuffer(struct gl_context *ctx, if (mode & GL_MAP_WRITE_BIT) usage |= PIPE_TRANSFER_WRITE; + /* Note: y=0=bottom of buffer while y2=0=top of buffer. + * 'invert' will be true for window-system buffers and false for + * user-allocated renderbuffers and textures. + */ + if (invert) + y2 = strb->Base.Height - y - h; + else + y2 = y; + strb->transfer = pipe_get_transfer(pipe, strb->texture, strb->rtt_level, strb->rtt_face + strb->rtt_slice, - usage, x, y, w, h); + usage, x, y2, w, h); if (strb->transfer) { - *mapOut = pipe_transfer_map(pipe, strb->transfer); - *rowStrideOut = strb->transfer->stride; + GLubyte *map = pipe_transfer_map(pipe, strb->transfer); + if (invert) { + *rowStrideOut = -strb->transfer->stride; + map += (h - 1) * strb->transfer->stride; + } + else { + *rowStrideOut = strb->transfer->stride; + } + *mapOut = map; } else { *mapOut = NULL; |