diff options
Diffstat (limited to 'src/drivers/PostScript/Fl_PostScript_image.cxx')
| -rw-r--r-- | src/drivers/PostScript/Fl_PostScript_image.cxx | 122 |
1 files changed, 118 insertions, 4 deletions
diff --git a/src/drivers/PostScript/Fl_PostScript_image.cxx b/src/drivers/PostScript/Fl_PostScript_image.cxx index 38b129e44..f2a41a2d4 100644 --- a/src/drivers/PostScript/Fl_PostScript_image.cxx +++ b/src/drivers/PostScript/Fl_PostScript_image.cxx @@ -1,7 +1,7 @@ // // Postscript image drawing implementation for the Fast Light Tool Kit (FLTK). // -// Copyright 1998-2021 by Bill Spitzak and others. +// Copyright 1998-2022 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this @@ -25,8 +25,10 @@ #include <stdlib.h> // abs(int) #include <string.h> // memcpy() -#if ! USE_PANGO -#include <stdio.h> // fprintf() +#if USE_PANGO +# include <cairo/cairo.h> +#else +# include <stdio.h> // fprintf() #endif struct callback_data { @@ -66,7 +68,119 @@ void Fl_PostScript_Graphics_Driver::draw_image(const uchar *data, int ix, int iy draw_image(draw_image_cb, &cb_data, ix, iy, iw, ih, abs(D)); } -#if ! USE_PANGO +#if USE_PANGO + +static void destroy_BGRA(void *data) { + delete[] (uchar*)data; +} + + +void Fl_PostScript_Graphics_Driver::draw_pixmap(Fl_Pixmap *pxm,int XP, int YP, int WP, int HP, int cx, int cy) { + Fl_RGB_Image *rgb = new Fl_RGB_Image(pxm); + draw_rgb_bitmap_(rgb, XP, YP, WP, HP, cx, cy); + delete rgb; +} + + +void Fl_PostScript_Graphics_Driver::draw_rgb(Fl_RGB_Image *rgb,int XP, int YP, int WP, int HP, int cx, int cy) { + draw_rgb_bitmap_(rgb, XP, YP, WP, HP, cx, cy); +} + + +void Fl_PostScript_Graphics_Driver::draw_bitmap(Fl_Bitmap *bitmap,int XP, int YP, int WP, int HP, int cx, int cy) { + draw_rgb_bitmap_(bitmap, XP, YP, WP, HP, cx, cy); +} + + +void Fl_PostScript_Graphics_Driver::draw_rgb_bitmap_(Fl_Image *img,int XP, int YP, int WP, int HP, int cx, int cy) +{ + cairo_surface_t *surf; + cairo_format_t format = (img->d() >= 1 ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_A1); + int stride = cairo_format_stride_for_width(format, img->data_w()); + uchar *BGRA = new uchar[stride * img->data_h()]; + memset(BGRA, 0, stride * img->data_h()); + if (img->d() >= 1) { // process Fl_RGB_Image of all depths + Fl_RGB_Image *rgb = (Fl_RGB_Image*)img; + int lrgb = rgb->ld() ? rgb->ld() : rgb->data_w() * rgb->d(); + uchar A = 0xff, R,G,B, *q; + const uchar *r; + float f = 1; + if (rgb->d() >= 3) { // color images + for (int j = 0; j < rgb->data_h(); j++) { + r = rgb->array + j * lrgb; + q = BGRA + j * stride; + for (int i = 0; i < rgb->data_w(); i++) { + R = *r; + G = *(r+1); + B = *(r+2); + if (rgb->d() == 4) { + A = *(r+3); + f = float(A)/0xff; + } + *q = B * f; + *(q+1) = G * f; + *(q+2) = R * f; + *(q+3) = A; + r += rgb->d(); q += 4; + } + } + } else if (rgb->d() == 1 || rgb->d() == 2) { // B&W + for (int j = 0; j < rgb->data_h(); j++) { + r = rgb->array + j * lrgb; + q = BGRA + j * stride; + for (int i = 0; i < rgb->data_w(); i++) { + G = *r; + if (rgb->d() == 2) { + A = *(r+1); + f = float(A)/0xff; + } + *(q) = G * f; + *(q+1) = G * f; + *(q+2) = G * f; + *(q+3) = A; + r += rgb->d(); q += 4; + } + } + } + } else { + Fl_Bitmap *bm = (Fl_Bitmap*)img; + uchar *r, p; + unsigned *q; + for (int j = 0; j < bm->data_h(); j++) { + r = (uchar*)bm->array + j * ((bm->data_w() + 7)/8); + q = (unsigned*)(BGRA + j * stride); + unsigned k = 0, mask32 = 1; + p = *r; + for (int i = 0; i < bm->data_w(); i++) { + if (p&1) (*q) |= mask32; + k++; + if (k % 8 != 0) p >>= 1; else p = *(++r); + if (k % 32 != 0) mask32 <<= 1; else {q++; mask32 = 1;} + } + } + } + surf = cairo_image_surface_create_for_data(BGRA, format, img->data_w(), img->data_h(), stride); + if (cairo_surface_status(surf) == CAIRO_STATUS_SUCCESS) { + static cairo_user_data_key_t key = {}; + (void)cairo_surface_set_user_data(surf, &key, BGRA, destroy_BGRA); + cairo_pattern_t *pat = cairo_pattern_create_for_surface(surf); + cairo_save(cairo_); + cairo_rectangle(cairo_, XP-0.5, YP-0.5, WP+1, HP+1); + cairo_clip(cairo_); + if (img->d() >= 1) cairo_set_source(cairo_, pat); + cairo_matrix_t matrix; + cairo_matrix_init_scale(&matrix, double(img->data_w())/(img->w()+1), double(img->data_h())/(img->h()+1)); + cairo_matrix_translate(&matrix, -XP+0.5+cx, -YP+0.5+cy); + cairo_pattern_set_matrix(pat, &matrix); + cairo_mask(cairo_, pat); + cairo_pattern_destroy(pat); + cairo_surface_destroy(surf); + cairo_restore(cairo_); + check_status(); + } +} + +#else // USE_PANGO // // Implementation of the /ASCII85Encode PostScript filter |