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comparison src/video/SDL_yuv_sw.c @ 2795:9e7ce3069096

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Set the alpha mask fixing software rendering in OpenGL
author Sam Lantinga <slouken@libsdl.org>
date Thu, 27 Nov 2008 22:11:01 +0000
parents 6bacfecbf27e
children 7e5ff6cd05bf
comparison
equal deleted inserted replaced
2794:f7872b7a8732 2795:9e7ce3069096
937 * Set up entries 0-255 in rgb-to-pixel value tables. 937 * Set up entries 0-255 in rgb-to-pixel value tables.
938 */ 938 */
939 for (i = 0; i < 256; ++i) { 939 for (i = 0; i < 256; ++i) {
940 r_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Rmask)); 940 r_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Rmask));
941 r_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Rmask); 941 r_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Rmask);
942 r_2_pix_alloc[i + 256] |= Amask;
942 g_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Gmask)); 943 g_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Gmask));
943 g_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Gmask); 944 g_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Gmask);
945 g_2_pix_alloc[i + 256] |= Amask;
944 b_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Bmask)); 946 b_2_pix_alloc[i + 256] = i >> (8 - number_of_bits_set(Bmask));
945 b_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Bmask); 947 b_2_pix_alloc[i + 256] <<= free_bits_at_bottom(Bmask);
948 b_2_pix_alloc[i + 256] |= Amask;
946 } 949 }
947 950
948 /* 951 /*
949 * If we have 16-bit output depth, then we double the value 952 * If we have 16-bit output depth, then we double the value
950 * in the top word. This means that we can write out both 953 * in the top word. This means that we can write out both