dbf-udg
changeset 6:57ea4988a9f2
added code to dump the ditherblock image
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Mon, 18 Feb 2013 04:41:26 +0200 |
| parents | e09cbb2e9d4f |
| children | 603656331514 |
| files | src/udg.cc |
| diffstat | 1 files changed, 22 insertions(+), 4 deletions(-) [+] |
line diff
1.1 --- a/src/udg.cc Mon Feb 18 03:46:52 2013 +0200 1.2 +++ b/src/udg.cc Mon Feb 18 04:41:26 2013 +0200 1.3 @@ -70,8 +70,13 @@ 1.4 1.5 bool init() 1.6 { 1.7 - float *img = new float[DITHER_SZ * DITHER_SZ * DITHER_LEVELS]; 1.8 - float *ptr = img; 1.9 + FILE *fp = fopen("udg.ppm", "wb"); 1.10 + if(fp) { 1.11 + fprintf(fp, "P6\n%d %d\n255\n", DITHER_SZ, DITHER_SZ * DITHER_LEVELS); 1.12 + } 1.13 + 1.14 + unsigned char *img = new unsigned char[DITHER_SZ * DITHER_SZ * DITHER_LEVELS]; 1.15 + unsigned char *ptr = img; 1.16 1.17 for(int i=0; i<DITHER_LEVELS; i++) { 1.18 float val = (float)i / (float)(DITHER_LEVELS - 1); 1.19 @@ -79,11 +84,24 @@ 1.20 for(int x=0; x<DITHER_SZ; x++) { 1.21 /* (1 + M) / (1 + MxN) */ 1.22 float thres = (1.0 + dither_matrix[x][y]) / (1.0 + DITHER_SZ * DITHER_SZ); 1.23 - *ptr++ = val >= thres ? 1.0 : 0.0; 1.24 + *ptr++ = val >= thres ? 255 : 0; 1.25 + 1.26 + if(fp) { 1.27 + int r = ptr[-1] ? 246 : 10; 1.28 + int g = ptr[-1] ? 198 : 72; 1.29 + int b = ptr[-1] ? 141 : 85; 1.30 + fputc(r, fp); 1.31 + fputc(g, fp); 1.32 + fputc(b, fp); 1.33 + } 1.34 } 1.35 } 1.36 } 1.37 1.38 + if(fp) { 1.39 + fclose(fp); 1.40 + } 1.41 + 1.42 if(!(prog = create_program_load("sdr/dither.v.glsl", "sdr/dither.p.glsl"))) { 1.43 return false; 1.44 } 1.45 @@ -94,7 +112,7 @@ 1.46 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 1.47 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 1.48 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 1.49 - glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, DITHER_SZ, DITHER_SZ * DITHER_LEVELS, 0, GL_LUMINANCE, GL_FLOAT, img); 1.50 + glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, DITHER_SZ, DITHER_SZ * DITHER_LEVELS, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, img); 1.51 1.52 if(!init_scroller()) { 1.53 return false;