From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 20 Mar 2014 21:46:37 +0000 (+0100)
Subject: Emulate glReadPixels of GL_BLUE.
X-Git-Tag: 1.1~12^2~16
X-Git-Url: https://git.sesse.net/?p=movit;a=commitdiff_plain;h=255f65578a7a20538a3d240c408c89452469e80a

Emulate glReadPixels of GL_BLUE.
---

diff --git a/test_util.cpp b/test_util.cpp
index c875974..8f81211 100644
--- a/test_util.cpp
+++ b/test_util.cpp
@@ -143,13 +143,19 @@ void EffectChainTester::run(float *out_data, GLenum format, Colorspace color_spa
 
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 	check_error();
-	if (!epoxy_is_desktop_gl() && format == GL_RED) {
+	if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE)) {
 		// GLES will only read GL_RGBA.
 		float *temp = new float[width * height * 4];
 		glReadPixels(0, 0, width, height, GL_RGBA, GL_FLOAT, temp);
 		check_error();
-		for (int i = 0; i < width * height; ++i) {
-			out_data[i] = temp[i * 4];
+		if (format == GL_BLUE) {
+			for (int i = 0; i < width * height; ++i) {
+				out_data[i] = temp[i * 4 + 2];
+			}
+		} else {
+			for (int i = 0; i < width * height; ++i) {
+				out_data[i] = temp[i * 4];
+			}
 		}
 		delete[] temp;
 	} else {
@@ -174,13 +180,19 @@ void EffectChainTester::run(unsigned char *out_data, GLenum format, Colorspace c
 
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 	check_error();
-	if (!epoxy_is_desktop_gl() && format == GL_RED) {
+	if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE)) {
 		// GLES will only read GL_RGBA.
 		unsigned char *temp = new unsigned char[width * height * 4];
 		glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, temp);
 		check_error();
-		for (int i = 0; i < width * height; ++i) {
-			out_data[i] = temp[i * 4];
+		if (format == GL_BLUE) {
+			for (int i = 0; i < width * height; ++i) {
+				out_data[i] = temp[i * 4 + 2];
+			}
+		} else {
+			for (int i = 0; i < width * height; ++i) {
+				out_data[i] = temp[i * 4];
+			}
 		}
 		delete[] temp;
 	} else {