From 255f65578a7a20538a3d240c408c89452469e80a Mon Sep 17 00:00:00 2001 From: "Steinar H. Gunderson" Date: Thu, 20 Mar 2014 22:46:37 +0100 Subject: [PATCH 1/1] Emulate glReadPixels of GL_BLUE. --- test_util.cpp | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) 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 { -- 2.39.2