clamp float colors
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51b728cf9a
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daaee90a26
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@ -409,6 +409,8 @@ test(GLenum type, GLint bits, const char *filename)
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printf("Rendering %d bit/channel image: %s\n", bits, filename);
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OSMesaColorClamp(GL_TRUE);
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init_context();
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render_image();
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if (Gradient)
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@ -421,7 +423,7 @@ test(GLenum type, GLint bits, const char *filename)
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if (WriteFiles && filename != NULL) {
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if (type == GL_UNSIGNED_SHORT) {
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GLushort *buffer16 = (GLushort *) buffer;
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GLubyte *buffer8 = malloc(WIDTH * HEIGHT * 4);
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GLubyte *buffer8 = (GLubyte *) malloc(WIDTH * HEIGHT * 4);
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int i;
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for (i = 0; i < WIDTH * HEIGHT * 4; i++)
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buffer8[i] = buffer16[i] >> 8;
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@ -430,8 +432,9 @@ test(GLenum type, GLint bits, const char *filename)
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}
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else if (type == GL_FLOAT) {
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GLfloat *buffer32 = (GLfloat *) buffer;
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GLubyte *buffer8 = malloc(WIDTH * HEIGHT * 4);
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GLubyte *buffer8 = (GLubyte *) malloc(WIDTH * HEIGHT * 4);
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int i;
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/* colors may be outside [0,1] so we need to clamp */
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for (i = 0; i < WIDTH * HEIGHT * 4; i++)
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buffer8[i] = (GLubyte) (buffer32[i] * 255.0);
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write_ppm(filename, buffer8, WIDTH, HEIGHT);
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