Emulate glReadPixels of GL_BLUE.

diff --git a/test_util.cpp b/test_util.cpp
index c8759744b9853229e24e1faf7a0f0f8321157758..8f812117858c12475b364e08f9eed797a96e73fc 100644 (file)
--- 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 {