r600g: Implement GL_ARB_texture_gather

[mesa.git] / src / mesa / state_tracker / st_cb_fbo.c

diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 70baa9965decf8fcffd8226485199cbbcc8400cf..ce8d91514d807190d2721a660bd48c0941478bf5 100644 (file)
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -1,6 +1,6 @@
 /**************************************************************************
  * 
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2007 VMware, Inc.
  * All Rights Reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -18,7 +18,7 @@
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -295,7 +295,7 @@ st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
    strb->Base.Format = st_pipe_format_to_mesa_format(format);
    strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format);
    strb->software = sw;
-   
+
    switch (format) {
    case PIPE_FORMAT_R8G8B8A8_UNORM:
    case PIPE_FORMAT_B8G8R8A8_UNORM:
@@ -307,6 +307,16 @@ st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
    case PIPE_FORMAT_X8R8G8B8_UNORM:
       strb->Base.InternalFormat = GL_RGB8;
       break;
+   case PIPE_FORMAT_R8G8B8A8_SRGB:
+   case PIPE_FORMAT_B8G8R8A8_SRGB:
+   case PIPE_FORMAT_A8R8G8B8_SRGB:
+      strb->Base.InternalFormat = GL_SRGB8_ALPHA8;
+      break;
+   case PIPE_FORMAT_R8G8B8X8_SRGB:
+   case PIPE_FORMAT_B8G8R8X8_SRGB:
+   case PIPE_FORMAT_X8R8G8B8_SRGB:
+      strb->Base.InternalFormat = GL_SRGB8;
+      break;
    case PIPE_FORMAT_B5G5R5A1_UNORM:
       strb->Base.InternalFormat = GL_RGB5_A1;
       break;
@@ -401,8 +411,17 @@ st_update_renderbuffer_surface(struct st_context *st,
    int rtt_width = strb->Base.Width;
    int rtt_height = strb->Base.Height;
    int rtt_depth = strb->Base.Depth;
-   enum pipe_format format = st->ctx->Color.sRGBEnabled ? resource->format :
-         util_format_linear(resource->format);
+   /*
+    * For winsys fbo, it is possible that the renderbuffer is sRGB-capable but
+    * the format of strb->texture is linear (because we have no control over
+    * the format).  Check strb->Base.Format instead of strb->texture->format
+    * to determine if the rb is sRGB-capable.
+    */
+   boolean enable_srgb = (st->ctx->Color.sRGBEnabled &&
+         _mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB);
+   enum pipe_format format = (enable_srgb) ?
+      util_format_srgb(resource->format) :
+      util_format_linear(resource->format);
    unsigned first_layer, last_layer, level;
 
    if (resource->target == PIPE_TEXTURE_1D_ARRAY) {
@@ -541,9 +560,15 @@ st_validate_attachment(struct gl_context *ctx,
 {
    const struct st_texture_object *stObj = st_texture_object(att->Texture);
    enum pipe_format format;
-   gl_format texFormat;
+   mesa_format texFormat;
    GLboolean valid;
 
+   /* Sanity check: we must be binding the surface as a (color) render target
+    * or depth/stencil target.
+    */
+   assert(bindings == PIPE_BIND_RENDER_TARGET ||
+          bindings == PIPE_BIND_DEPTH_STENCIL);
+
    /* Only validate texture attachments for now, since
     * st_renderbuffer_alloc_storage makes sure that
     * the format is supported.
@@ -562,7 +587,7 @@ st_validate_attachment(struct gl_context *ctx,
     * Later when we create a surface, we change the format to a linear one. */
    if (!ctx->Extensions.EXT_framebuffer_sRGB &&
        _mesa_get_format_color_encoding(texFormat) == GL_SRGB) {
-      const gl_format linearFormat = _mesa_get_srgb_format_linear(texFormat);
+      const mesa_format linearFormat = _mesa_get_srgb_format_linear(texFormat);
       format = st_mesa_format_to_pipe_format(linearFormat);
    }
 
@@ -680,7 +705,10 @@ st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)
    /* add the renderbuffers on demand */
    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
       gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i];
-      st_manager_add_color_renderbuffer(st, fb, idx);
+
+      if (idx >= 0) {
+         st_manager_add_color_renderbuffer(st, fb, idx);
+      }
    }
 }
 
@@ -697,7 +725,8 @@ st_ReadBuffer(struct gl_context *ctx, GLenum buffer)
    (void) buffer;
 
    /* add the renderbuffer on demand */
-   st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);
+   if (fb->_ColorReadBufferIndex >= 0)
+      st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);
 }