fbobject.c

mesa-6.5-minigui源码

      }
      if (texObj && texObj->Target != GL_TEXTURE_1D) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glFramebufferTexture1DEXT(texture target mismatch)");
         return;
      }
      break;
   case 2:
      if (textarget != GL_TEXTURE_2D &&
          textarget != GL_TEXTURE_RECTANGLE_ARB &&
          !IS_CUBE_FACE(textarget)) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glFramebufferTexture2DEXT(textarget)");
         return;
      }
      if (texObj) {
         if ((texObj->Target == GL_TEXTURE_2D && textarget != GL_TEXTURE_2D) ||
             (texObj->Target == GL_TEXTURE_RECTANGLE_ARB
              && textarget != GL_TEXTURE_RECTANGLE_ARB) ||
             (texObj->Target == GL_TEXTURE_CUBE_MAP
              && !IS_CUBE_FACE(textarget))) {
            _mesa_error(ctx, GL_INVALID_OPERATION,
                        "glFramebufferTexture1DEXT(texture target mismatch)");
            return;
         }
      }
      break;
   case 3:
      if (textarget != GL_TEXTURE_3D) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glFramebufferTexture3DEXT(textarget)");
         return;
      }
      if (texObj && texObj->Target != GL_TEXTURE_3D) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glFramebufferTexture3DEXT(texture target mismatch)");
         return;
      }
      {
         const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
         if (zoffset < 0 || zoffset >= maxSize) {
            _mesa_error(ctx, GL_INVALID_VALUE,
                        "glFramebufferTexture3DEXT(zoffset)");
            return;
         }
      }
      break;
   default:
      _mesa_problem(ctx, "Unexpected dims in error_check_framebuffer_texture");
      return;
   }

   if ((level < 0) || level >= _mesa_max_texture_levels(ctx, textarget)) {
      _mesa_error(ctx, GL_INVALID_VALUE,
                  "glFramebufferTexture%dDEXT(level)", dims);
      return;
   }

   att = _mesa_get_attachment(ctx, fb, attachment);
   if (att == NULL) {
      _mesa_error(ctx, GL_INVALID_ENUM,
		  "glFramebufferTexture%dDEXT(attachment)", dims);
      return;
   }

   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

   _glthread_LOCK_MUTEX(fb->Mutex);
   if (texObj) {
      _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
                                   level, zoffset);
   }
   else {
      _mesa_remove_attachment(ctx, att);
   }
   _glthread_UNLOCK_MUTEX(fb->Mutex);
}



void GLAPIENTRY
_mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
                              GLenum textarget, GLuint texture, GLint level)
{
   const GLint zoffset = 0;
   framebuffer_texture(1, target, attachment, textarget, texture,
                       level, zoffset);
}


void GLAPIENTRY
_mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
                              GLenum textarget, GLuint texture, GLint level)
{
   const GLint zoffset = 0;
   framebuffer_texture(2, target, attachment, textarget, texture,
                       level, zoffset);
}


void GLAPIENTRY
_mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
                              GLenum textarget, GLuint texture,
                              GLint level, GLint zoffset)
{
   framebuffer_texture(3, target, attachment, textarget, texture,
                       level, zoffset);
}



void GLAPIENTRY
_mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
                                 GLenum renderbufferTarget,
                                 GLuint renderbuffer)
{
   struct gl_renderbuffer_attachment *att;
   struct gl_framebuffer *fb;
   struct gl_renderbuffer *rb;
   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END(ctx);

   switch (target) {
#if FEATURE_EXT_framebuffer_blit
   case GL_DRAW_FRAMEBUFFER_EXT:
      if (!ctx->Extensions.EXT_framebuffer_blit) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glFramebufferRenderbufferEXT(target)");
         return;
      }
      fb = ctx->DrawBuffer;
      break;
   case GL_READ_FRAMEBUFFER_EXT:
      if (!ctx->Extensions.EXT_framebuffer_blit) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glFramebufferRenderbufferEXT(target)");
         return;
      }
      fb = ctx->ReadBuffer;
      break;
#endif
   case GL_FRAMEBUFFER_EXT:
      fb = ctx->DrawBuffer;
      break;
   default:
      _mesa_error(ctx, GL_INVALID_ENUM,
                  "glFramebufferRenderbufferEXT(target)");
      return;
   }

   if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
      _mesa_error(ctx, GL_INVALID_ENUM,
                  "glFramebufferRenderbufferEXT(renderbufferTarget)");
      return;
   }

   if (fb->Name == 0) {
      /* Can't attach new renderbuffers to a window system framebuffer */
      _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
      return;
   }

   att = _mesa_get_attachment(ctx, fb, attachment);
   if (att == NULL) {
      _mesa_error(ctx, GL_INVALID_ENUM,
                 "glFramebufferRenderbufferEXT(attachment)");
      return;
   }

   if (renderbuffer) {
      rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
      if (!rb) {
	 _mesa_error(ctx, GL_INVALID_OPERATION,
		     "glFramebufferRenderbufferEXT(renderbuffer)");
	 return;
      }
   }
   else {
      /* remove renderbuffer attachment */
      rb = NULL;
   }

   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

   assert(ctx->Driver.FramebufferRenderbuffer);
   ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);

   /* Some subsequent GL commands may depend on the framebuffer's visual
    * after the binding is updated.  Update visual info now.
    */
   _mesa_update_framebuffer_visual(fb);
}


void GLAPIENTRY
_mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
                                             GLenum pname, GLint *params)
{
   const struct gl_renderbuffer_attachment *att;
   struct gl_framebuffer *buffer;
   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END(ctx);

   switch (target) {
#if FEATURE_EXT_framebuffer_blit
   case GL_DRAW_FRAMEBUFFER_EXT:
      if (!ctx->Extensions.EXT_framebuffer_blit) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glGetFramebufferAttachmentParameterivEXT(target)");
         return;
      }
      buffer = ctx->DrawBuffer;
      break;
   case GL_READ_FRAMEBUFFER_EXT:
      if (!ctx->Extensions.EXT_framebuffer_blit) {
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glGetFramebufferAttachmentParameterivEXT(target)");
         return;
      }
      buffer = ctx->ReadBuffer;
      break;
#endif
   case GL_FRAMEBUFFER_EXT:
      buffer = ctx->DrawBuffer;
      break;
   default:
      _mesa_error(ctx, GL_INVALID_ENUM,
                  "glGetFramebufferAttachmentParameterivEXT(target)");
      return;
   }

   if (buffer->Name == 0) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glGetFramebufferAttachmentParameterivEXT");
      return;
   }

   att = _mesa_get_attachment(ctx, buffer, attachment);
   if (att == NULL) {
      _mesa_error(ctx, GL_INVALID_ENUM,
                  "glGetFramebufferAttachmentParameterivEXT(attachment)");
      return;
   }

   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

   switch (pname) {
   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
      *params = att->Type;
      return;
   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
      if (att->Type == GL_RENDERBUFFER_EXT) {
	 *params = att->Renderbuffer->Name;
      }
      else if (att->Type == GL_TEXTURE) {
	 *params = att->Texture->Name;
      }
      else {
	 _mesa_error(ctx, GL_INVALID_ENUM,
		     "glGetFramebufferAttachmentParameterivEXT(pname)");
      }
      return;
   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
      if (att->Type == GL_TEXTURE) {
	 *params = att->TextureLevel;
      }
      else {
	 _mesa_error(ctx, GL_INVALID_ENUM,
		     "glGetFramebufferAttachmentParameterivEXT(pname)");
      }
      return;
   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
      if (att->Type == GL_TEXTURE) {
	 *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
      }
      else {
	 _mesa_error(ctx, GL_INVALID_ENUM,
		     "glGetFramebufferAttachmentParameterivEXT(pname)");
      }
      return;
   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
      if (att->Type == GL_TEXTURE) {
	 *params = att->Zoffset;
      }
      else {
	 _mesa_error(ctx, GL_INVALID_ENUM,
		     "glGetFramebufferAttachmentParameterivEXT(pname)");
      }
      return;
   default:
      _mesa_error(ctx, GL_INVALID_ENUM,
                  "glGetFramebufferAttachmentParameterivEXT(pname)");
      return;
   }
}


void GLAPIENTRY
_mesa_GenerateMipmapEXT(GLenum target)
{
   struct gl_texture_unit *texUnit;
   struct gl_texture_object *texObj;
   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END(ctx);
   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

   switch (target) {
   case GL_TEXTURE_1D:
   case GL_TEXTURE_2D:
   case GL_TEXTURE_3D:
   case GL_TEXTURE_CUBE_MAP:
      /* OK, legal value */
      break;
   default:
      _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
      return;
   }

   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
   texObj = _mesa_select_tex_object(ctx, texUnit, target);

   /* XXX this might not handle cube maps correctly */
   _mesa_generate_mipmap(ctx, target, texUnit, texObj);
}


#if FEATURE_EXT_framebuffer_blit
void GLAPIENTRY
_mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
                         GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                         GLbitfield mask, GLenum filter)
{
   GET_CURRENT_CONTEXT(ctx);

   ASSERT_OUTSIDE_BEGIN_END(ctx);
   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

   if (ctx->NewState) {
      _mesa_update_state(ctx);
   }

   if (!ctx->ReadBuffer) {
      /* XXX */
   }

   /* check for complete framebuffers */
   if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
       ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glBlitFramebufferEXT(incomplete draw/read buffers)");
      return;
   }

   if (filter != GL_NEAREST && filter != GL_LINEAR) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
      return;
   }

   if (mask & ~(GL_COLOR_BUFFER_BIT |
                GL_DEPTH_BUFFER_BIT |
                GL_STENCIL_BUFFER_BIT)) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
      return;
   }

   /* depth/stencil must be blitted with nearest filtering */
   if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
        && filter != GL_NEAREST) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
             "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
      return;
   }

   if (mask & GL_STENCIL_BUFFER_BIT) {
      struct gl_renderbuffer *readRb = ctx->ReadBuffer->_StencilBuffer;
      struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_StencilBuffer;
      if (readRb->StencilBits != drawRb->StencilBits) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glBlitFramebufferEXT(stencil buffer size mismatch");
         return;
      }
   }

   if (mask & GL_DEPTH_BUFFER_BIT) {
      struct gl_renderbuffer *readRb = ctx->ReadBuffer->_DepthBuffer;
      struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_DepthBuffer;
      if (readRb->DepthBits != drawRb->DepthBits) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glBlitFramebufferEXT(depth buffer size mismatch");
         return;
      }
   }

   if (!ctx->Extensions.EXT_framebuffer_blit) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
      return;
   }

   ASSERT(ctx->Driver.BlitFramebuffer);
   ctx->Driver.BlitFramebuffer(ctx,
                               srcX0, srcY0, srcX1, srcY1,
                               dstX0, dstY0, dstX1, dstY1,
                               mask, filter);
}
#endif /* FEATURE_EXT_framebuffer_blit */