add_input(data, pixel_format, color_space, gamma_curve);
}
+ GLuint type;
+ if (framebuffer_format == GL_RGBA8) {
+ type = GL_UNSIGNED_BYTE;
+ } else if (framebuffer_format == GL_RGBA16F || framebuffer_format == GL_RGBA32F) {
+ type = GL_FLOAT;
+ } else {
+ // Add more here as needed.
+ assert(false);
+ }
+
glGenTextures(1, &texnum);
check_error();
glBindTexture(GL_TEXTURE_2D, texnum);
check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, framebuffer_format, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ glTexImage2D(GL_TEXTURE_2D, 0, framebuffer_format, width, height, 0, GL_RGBA, type, NULL);
check_error();
glGenFramebuffers(1, &fbo);
chain.render_to_fbo(fbo, width, height);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
- glReadPixels(0, 0, width, height, format, GL_FLOAT, out_data);
+ check_error();
+ if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE || format == GL_ALPHA)) {
+ // 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();
+ if (format == GL_ALPHA) {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4 + 3];
+ }
+ } else if (format == GL_BLUE) {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4 + 2];
+ }
+ } else {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4];
+ }
+ }
+ delete[] temp;
+ } else {
+ glReadPixels(0, 0, width, height, format, GL_FLOAT, out_data);
+ check_error();
+ }
if (format == GL_RGBA) {
width *= 4;
chain.render_to_fbo(fbo, width, height);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
- glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, out_data);
+ check_error();
+ if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE || format == GL_ALPHA)) {
+ // 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();
+ if (format == GL_ALPHA) {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4 + 3];
+ }
+ } else if (format == GL_BLUE) {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4 + 2];
+ }
+ } else {
+ for (unsigned i = 0; i < width * height; ++i) {
+ out_data[i] = temp[i * 4];
+ }
+ }
+ delete[] temp;
+ } else {
+ glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, out_data);
+ check_error();
+ }
if (format == GL_RGBA) {
width *= 4;