}
-static void color_snapshot(Image::Image &image) {
- GLint drawbuffer = double_buffer ? GL_BACK : GL_FRONT;
- GLint readbuffer = double_buffer ? GL_BACK : GL_FRONT;
- glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
- glGetIntegerv(GL_READ_BUFFER, &readbuffer);
- glReadBuffer(drawbuffer);
-
- glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
- glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
- glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
- glPixelStorei(GL_PACK_ROW_LENGTH, 0);
- glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
- glPixelStorei(GL_PACK_SKIP_ROWS, 0);
- glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- glReadPixels(0, 0, image.width, image.height, GL_RGBA, GL_UNSIGNED_BYTE, image.pixels);
-
- glPopClientAttrib();
-
- glReadBuffer(readbuffer);
-}
-
-
void snapshot(unsigned call_no) {
if (!drawable ||
(!snapshot_prefix && !compare_prefix)) {
}
}
- Image::Image src(drawable->width, drawable->height, true);
- color_snapshot(src);
+ Image::Image *src = glstate::getDrawBufferImage(GL_RGBA);
+ if (!src) {
+ return;
+ }
if (snapshot_prefix) {
char filename[PATH_MAX];
snprintf(filename, sizeof filename, "%s%010u.png", snapshot_prefix, call_no);
- if (src.writePNG(filename) && retrace::verbosity >= 0) {
+ if (src->writePNG(filename) && retrace::verbosity >= 0) {
std::cout << "Wrote " << filename << "\n";
}
}
if (ref) {
- std::cout << "Snapshot " << call_no << " average precision of " << src.compare(*ref) << " bits\n";
+ std::cout << "Snapshot " << call_no << " average precision of " << src->compare(*ref) << " bits\n";
delete ref;
}
+
+ delete src;
}
}
+Image::Image *
+getDrawBufferImage(GLenum format) {
+ GLint width, height;
+
+ if (format != GL_RGBA) {
+ // FIXME: this function can only handle 4-channel images
+ return NULL;
+ }
+
+ if (!getDrawableBounds(&width, &height)) {
+ return NULL;
+ }
+
+ Image::Image *image = new Image::Image(width, height, true);
+ if (!image) {
+ return NULL;
+ }
+
+ GLint drawbuffer = GL_NONE;
+ GLint readbuffer = GL_NONE;
+ glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
+ glGetIntegerv(GL_READ_BUFFER, &readbuffer);
+ glReadBuffer(drawbuffer);
+
+ glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
+ glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
+ glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
+ glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
+ glPixelStorei(GL_PACK_SKIP_ROWS, 0);
+ glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
+ glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+ glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
+
+ glPopClientAttrib();
+
+ glReadBuffer(readbuffer);
+
+ return image;
+}
+
+
static inline void
dumpDrawBufferImage(JSONWriter &json, GLenum format)
{