diff options
Diffstat (limited to 'source/fitz/output-tga.c')
| -rw-r--r-- | source/fitz/output-tga.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/source/fitz/output-tga.c b/source/fitz/output-tga.c deleted file mode 100644 index 51ebe5db..00000000 --- a/source/fitz/output-tga.c +++ /dev/null @@ -1,169 +0,0 @@ -#include "mupdf/fitz.h" - -#include <string.h> - -/* - * Write pixmap to TGA file (with or without alpha channel) - */ - -typedef struct { - fz_band_writer super; - int is_bgr; -} tga_band_writer; - -static inline void tga_put_pixel(fz_context *ctx, fz_output *out, const unsigned char *data, int n, int is_bgr) -{ - int a, inva; - switch(n) - { - case 4: /* RGBA or BGRA */ - a = data[3]; - inva = a ? 256 * 255 / a : 0; - if (!is_bgr) { - fz_write_byte(ctx, out, (data[2] * inva + 128)>>8); - fz_write_byte(ctx, out, (data[1] * inva + 128)>>8); - fz_write_byte(ctx, out, (data[0] * inva + 128)>>8); - } else { - fz_write_byte(ctx, out, (data[0] * inva + 128)>>8); - fz_write_byte(ctx, out, (data[1] * inva + 128)>>8); - fz_write_byte(ctx, out, (data[2] * inva + 128)>>8); - } - fz_write_byte(ctx, out, a); - break; - case 3: /* RGB or BGR */ - if (!is_bgr) { - fz_write_byte(ctx, out, data[2]); - fz_write_byte(ctx, out, data[1]); - fz_write_byte(ctx, out, data[0]); - } else { - fz_write_byte(ctx, out, data[0]); - fz_write_byte(ctx, out, data[1]); - fz_write_byte(ctx, out, data[2]); - } - break; - case 2: /* GA */ - a = data[1]; - inva = a ? 256 * 255 / a : 0; - inva = (data[0] * inva + 128)>>8; - fz_write_byte(ctx, out, inva); - fz_write_byte(ctx, out, inva); - fz_write_byte(ctx, out, inva); - fz_write_byte(ctx, out, a); - break; - case 1: /* G */ - fz_write_byte(ctx, out, data[0]); - break; - } -} - -void -fz_save_pixmap_as_tga(fz_context *ctx, fz_pixmap *pixmap, const char *filename) -{ - fz_output *out = fz_new_output_with_path(ctx, filename, 0); - fz_try(ctx) - { - fz_write_pixmap_as_tga(ctx, out, pixmap); - fz_close_output(ctx, out); - } - fz_always(ctx) - fz_drop_output(ctx, out); - fz_catch(ctx) - fz_rethrow(ctx); -} - -void -fz_write_pixmap_as_tga(fz_context *ctx, fz_output *out, fz_pixmap *pixmap) -{ - fz_band_writer *writer = fz_new_tga_band_writer(ctx, out, fz_colorspace_is_bgr(ctx, pixmap->colorspace)); - fz_try(ctx) - { - fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps); - fz_write_band(ctx, writer, -pixmap->stride, pixmap->h, pixmap->samples + pixmap->stride * (pixmap->h-1)); - } - fz_always(ctx) - fz_drop_band_writer(ctx, writer); - fz_catch(ctx) - fz_rethrow(ctx); -} - -static void -tga_write_header(fz_context *ctx, fz_band_writer *writer_, const fz_colorspace *cs) -{ - tga_band_writer *writer = (tga_band_writer *)writer_; - fz_output *out = writer->super.out; - int w = writer->super.w; - int h = writer->super.h; - int n = writer->super.n; - int alpha = writer->super.alpha; - unsigned char head[18]; - int d = (alpha && n > 1) ? 4 : (n == 1 ? 1 : 3); - - if (writer->super.s != 0) - fz_throw(ctx, FZ_ERROR_GENERIC, "TGA writer cannot cope with spot colors"); - if (n-alpha > 1 && n != 3+alpha) - fz_throw(ctx, FZ_ERROR_GENERIC, "pixmap must be grayscale/rgb/rgba (with or without alpha) to write as tga"); - memset(head, 0, sizeof(head)); - head[2] = n > 1 ? 10 /* RGB or RGBA or GA */ : 11 /* G */; - head[12] = w & 0xFF; head[13] = (w >> 8) & 0xFF; - head[14] = h & 0xFF; head[15] = (h >> 8) & 0xFF; - head[16] = d * 8; /* BPP */ - head[17] = alpha && n > 1 ? 8 : 0; /* Alpha bpp */ - - fz_write_data(ctx, out, head, sizeof(head)); -} - -static void -tga_write_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *samples) -{ - tga_band_writer *writer = (tga_band_writer *)writer_; - fz_output *out = writer->super.out; - int w = writer->super.w; - int n = writer->super.n; - int d = (writer->super.alpha && n > 1) ? 4 : (n == 1 ? 1 : 3); - int is_bgr = writer->is_bgr; - int k; - - for (k = 0; k < band_height; k++) - { - int i, j; - const unsigned char *line = samples + stride * k; - for (i = 0, j = 1; i < w; i += j, j = 1) - { - for (; i + j < w && j < 128 && !memcmp(line + i * n, line + (i + j) * n, d); j++); - if (j > 1) - { - fz_write_byte(ctx, out, j - 1 + 128); - tga_put_pixel(ctx, out, line + i * n, n, is_bgr); - } - else - { - for (; i + j < w && j <= 128 && memcmp(line + (i + j - 1) * n, line + (i + j) * n, d) != 0; j++); - if (i + j < w || j > 128) - j--; - fz_write_byte(ctx, out, j - 1); - for (; j > 0; j--, i++) - tga_put_pixel(ctx, out, line + i * n, n, is_bgr); - } - } - } -} - -static void -tga_write_trailer(fz_context *ctx, fz_band_writer *writer) -{ - fz_output *out = writer->out; - - fz_write_data(ctx, out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.\0", 26); -} - -fz_band_writer *fz_new_tga_band_writer(fz_context *ctx, fz_output *out, int is_bgr) -{ - tga_band_writer *writer = fz_new_band_writer(ctx, tga_band_writer, out); - - writer->super.header = tga_write_header; - writer->super.band = tga_write_band; - writer->super.trailer = tga_write_trailer; - writer->is_bgr = is_bgr; - - return &writer->super; -} |