C++ (Cpp) _cogl_texture_prep_gl_alignment_for_pixels_download示例

示例#1

文件： cogl-texture-driver-gl.c 项目： ChrisCummins/cogl

/* OpenGL - unlike GLES - can download pixel data into a sub region of
 * a larger destination buffer */
static void
prep_gl_for_pixels_download_full (CoglContext *ctx,
                                  int image_width,
                                  int pixels_rowstride,
                                  int image_height,
                                  int pixels_src_x,
                                  int pixels_src_y,
                                  int pixels_bpp)
{
  GE( ctx, glPixelStorei (GL_PACK_ROW_LENGTH, pixels_rowstride / pixels_bpp) );

  GE( ctx, glPixelStorei (GL_PACK_SKIP_PIXELS, pixels_src_x) );
  GE( ctx, glPixelStorei (GL_PACK_SKIP_ROWS, pixels_src_y) );

  if (cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_3D))
    GE( ctx, glPixelStorei (GL_PACK_IMAGE_HEIGHT, image_height) );

  _cogl_texture_prep_gl_alignment_for_pixels_download (pixels_bpp,
                                                       image_width,
                                                       pixels_rowstride);
}

示例#2

文件： cogl-texture-driver-gles.c 项目： nobled/clutter

void
_cogl_texture_driver_prep_gl_for_pixels_download (int pixels_rowstride,
        int pixels_bpp)
{
    _cogl_texture_prep_gl_alignment_for_pixels_download (pixels_rowstride);
}