C++ (Cpp) vbo_exec_DrawRangeElements示例

示例#1

文件： vbo_exec_array.c 项目： astrofimov/vgallium

static void GLAPIENTRY
vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   GLuint min_index = 0;
   GLuint max_index = 0;

   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
      return;

   if (!vbo_validate_shaders(ctx)) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawElements(bad shader)");
      return;
   }

   if (ctx->Array.ElementArrayBufferObj->Name) {
      const GLvoid *map = ctx->Driver.MapBuffer(ctx,
						 GL_ELEMENT_ARRAY_BUFFER_ARB,
						 GL_READ_ONLY,
						 ctx->Array.ElementArrayBufferObj);

      get_minmax_index(count, type, ADD_POINTERS(map, indices), &min_index, &max_index);

      ctx->Driver.UnmapBuffer(ctx,
			      GL_ELEMENT_ARRAY_BUFFER_ARB,
			      ctx->Array.ElementArrayBufferObj);
   }
   else {
      get_minmax_index(count, type, indices, &min_index, &max_index);
   }

   vbo_exec_DrawRangeElements(mode, min_index, max_index, count, type, indices);
}

示例#2

void GLAPIENTRY
_mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
                        GLenum type, const GLvoid *indices)
{
   vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
}