Ejemplo n.º 1
0
void GLAPIENTRY
_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
		  GLenum format, GLenum type, GLvoid *pixels )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   FLUSH_CURRENT(ctx, 0);

   if (width < 0 || height < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE,
                   "glReadPixels(width=%d height=%d)", width, height );
      return;
   }

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

   if (_mesa_error_check_format_type(ctx, format, type, GL_FALSE)) {
      /* found an error */
      return;
   }

   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glReadPixels(incomplete framebuffer)" );
      return;
   }

   if (!_mesa_source_buffer_exists(ctx, format)) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
      return;
   }

   if (ctx->Pack.BufferObj->Name) {
      if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1,
                                     format, type, pixels)) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glReadPixels(invalid PBO access)");
         return;
      }

      if (ctx->Pack.BufferObj->Pointer) {
         /* buffer is mapped - that's an error */
         _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
         return;
      }
   }

   ctx->Driver.ReadPixels(ctx, x, y, width, height,
			  format, type, &ctx->Pack, pixels);
}
Ejemplo n.º 2
0
void GLAPIENTRY
_mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height,
		      GLenum format, GLenum type, GLsizei bufSize,
                      GLvoid *pixels )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   FLUSH_CURRENT(ctx, 0);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glReadPixels(%d, %d, %s, %s, %p)\n",
                  width, height,
                  _mesa_lookup_enum_by_nr(format),
                  _mesa_lookup_enum_by_nr(type),
                  pixels);

   if (width < 0 || height < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE,
                   "glReadPixels(width=%d height=%d)", width, height );
      return;
   }

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

   if (_mesa_error_check_format_type(ctx, format, type, GL_FALSE)) {
      /* found an error */
      return;
   }

   /* Check that the destination format and source buffer are both
    * integer-valued or both non-integer-valued.
    */
   if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) {
      const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
      const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format);
      const GLboolean dstInteger = _mesa_is_integer_format(format);
      if (dstInteger != srcInteger) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glReadPixels(integer / non-integer format mismatch");
         return;
      }
   }

   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glReadPixels(incomplete framebuffer)" );
      return;
   }

   if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(multisample FBO)");
      return;
   }

   if (!_mesa_source_buffer_exists(ctx, format)) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
      return;
   }

   if (width == 0 || height == 0)
      return; /* nothing to do */

   if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1,
                                  format, type, bufSize, pixels)) {
      if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glReadPixels(out of bounds PBO access)");
      } else {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glReadnPixelsARB(out of bounds access:"
                     " bufSize (%d) is too small)", bufSize);
      }
      return;
   }

   if (_mesa_is_bufferobj(ctx->Pack.BufferObj) &&
       _mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
      /* buffer is mapped - that's an error */
      _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
      return;
   }

   ctx->Driver.ReadPixels(ctx, x, y, width, height,
			  format, type, &ctx->Pack, pixels);
}
Ejemplo n.º 3
0
/*
 * Execute glDrawPixels
 */
static void GLAPIENTRY
_mesa_DrawPixels( GLsizei width, GLsizei height,
                  GLenum format, GLenum type, const GLvoid *pixels )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
      return;
   }

   /* We're not using the current vertex program, and the driver may install
    * it's own.
    */
   _mesa_set_vp_override(ctx, GL_TRUE);

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

   if (!valid_fragment_program(ctx)) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glDrawPixels (invalid fragment program)");
      goto end;
   }

   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
      /* the error was already recorded */
      goto end;
   }

   if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glDrawPixels(incomplete framebuffer)" );
      goto end;
   }

   if (!ctx->Current.RasterPosValid) {
      goto end; /* no-op, not an error */
   }

   if (ctx->RenderMode == GL_RENDER) {
      if (width > 0 && height > 0) {
         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
         GLint x = IROUND(ctx->Current.RasterPos[0]);
         GLint y = IROUND(ctx->Current.RasterPos[1]);

         if (ctx->Unpack.BufferObj->Name) {
            /* unpack from PBO */
            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
                                           format, type, pixels)) {
               _mesa_error(ctx, GL_INVALID_OPERATION,
                           "glDrawPixels(invalid PBO access)");
               goto end;
            }
            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
               /* buffer is mapped - that's an error */
               _mesa_error(ctx, GL_INVALID_OPERATION,
                           "glDrawPixels(PBO is mapped)");
               goto end;
            }
         }

         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
                                &ctx->Unpack, pixels);
      }
   }
   else if (ctx->RenderMode == GL_FEEDBACK) {
      /* Feedback the current raster pos info */
      FLUSH_CURRENT( ctx, 0 );
      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
      _mesa_feedback_vertex( ctx,
                             ctx->Current.RasterPos,
                             ctx->Current.RasterColor,
                             ctx->Current.RasterIndex,
                             ctx->Current.RasterTexCoords[0] );
   }
   else {
      ASSERT(ctx->RenderMode == GL_SELECT);
      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
   }

end:
   _mesa_set_vp_override(ctx, GL_FALSE);
}
Ejemplo n.º 4
0
/*
 * Execute glDrawPixels
 */
void GLAPIENTRY
_mesa_DrawPixels( GLsizei width, GLsizei height,
                  GLenum format, GLenum type, const GLvoid *pixels )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
      return;
   }

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

   if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glDrawPixels (invalid fragment program)");
      return;
   }

   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
      /* found an error */
      return;
   }

   if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glDrawPixels(incomplete framebuffer)" );
      return;
   }

   if (!ctx->Current.RasterPosValid) {
      return;
   }

   if (ctx->RenderMode == GL_RENDER) {
      /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
      GLint x = IROUND(ctx->Current.RasterPos[0]);
      GLint y = IROUND(ctx->Current.RasterPos[1]);

      if (ctx->Unpack.BufferObj->Name) {
         /* unpack from PBO */
         if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
                                        format, type, pixels)) {
            _mesa_error(ctx, GL_INVALID_OPERATION,
                        "glDrawPixels(invalid PBO access)");
            return;
         }
         if (ctx->Unpack.BufferObj->Pointer) {
            /* buffer is mapped - that's an error */
            _mesa_error(ctx, GL_INVALID_OPERATION,
                        "glDrawPixels(PBO is mapped)");
            return;
         }
      }

      ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
			     &ctx->Unpack, pixels);
   }
   else if (ctx->RenderMode == GL_FEEDBACK) {
      /* Feedback the current raster pos info */
      FLUSH_CURRENT( ctx, 0 );
      FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
      _mesa_feedback_vertex( ctx,
                             ctx->Current.RasterPos,
                             ctx->Current.RasterColor,
                             ctx->Current.RasterIndex,
                             ctx->Current.RasterTexCoords[0] );
   }
   else {
      ASSERT(ctx->RenderMode == GL_SELECT);
      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
   }
}