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Diffstat (limited to 'frontends/gtk/bitmap.c')
-rw-r--r--frontends/gtk/bitmap.c274
1 files changed, 12 insertions, 262 deletions
diff --git a/frontends/gtk/bitmap.c b/frontends/gtk/bitmap.c
index e7b859d06..a995a9e28 100644
--- a/frontends/gtk/bitmap.c
+++ b/frontends/gtk/bitmap.c
@@ -45,22 +45,25 @@
* Create a bitmap.
*
* \param width width of image in pixels
- * \param height width of image in pixels
- * \param state a flag word indicating the initial state
+ * \param height height of image in pixels
+ * \param flags flags for bitmap creation
* \return an opaque struct bitmap, or NULL on memory exhaustion
*/
-static void *bitmap_create(int width, int height, unsigned int state)
+static void *bitmap_create(int width, int height, enum gui_bitmap_flags flags)
{
struct bitmap *gbitmap;
+ if (width == 0 || height == 0) {
+ return NULL;
+ }
+
gbitmap = calloc(1, sizeof(struct bitmap));
if (gbitmap != NULL) {
- if ((state & BITMAP_OPAQUE) != 0) {
- gbitmap->surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
- } else {
- gbitmap->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
+ if (flags & BITMAP_OPAQUE) {
+ gbitmap->opaque = true;
}
+ gbitmap->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
if (cairo_surface_status(gbitmap->surface) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy(gbitmap->surface);
free(gbitmap);
@@ -81,76 +84,8 @@ static void *bitmap_create(int width, int height, unsigned int state)
static void bitmap_set_opaque(void *vbitmap, bool opaque)
{
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- cairo_format_t fmt;
- cairo_surface_t *nsurface = NULL;
-
- assert(gbitmap);
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- if (fmt == CAIRO_FORMAT_RGB24) {
- if (opaque == false) {
- /* opaque to transparent */
- nsurface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
- cairo_image_surface_get_width(gbitmap->surface),
- cairo_image_surface_get_height(gbitmap->surface));
-
- }
-
- } else {
- if (opaque == true) {
- /* transparent to opaque */
- nsurface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
- cairo_image_surface_get_width(gbitmap->surface),
- cairo_image_surface_get_height(gbitmap->surface));
-
- }
- }
-
- if (nsurface != NULL) {
- if (cairo_surface_status(nsurface) != CAIRO_STATUS_SUCCESS) {
- cairo_surface_destroy(nsurface);
- } else {
- memcpy(cairo_image_surface_get_data(nsurface),
- cairo_image_surface_get_data(gbitmap->surface),
- cairo_image_surface_get_stride(gbitmap->surface) * cairo_image_surface_get_height(gbitmap->surface));
- cairo_surface_destroy(gbitmap->surface);
- gbitmap->surface = nsurface;
-
- cairo_surface_mark_dirty(gbitmap->surface);
-
- }
- }
-}
-
-
-/**
- * Tests whether a bitmap has an opaque alpha channel
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return whether the bitmap is opaque
- */
-static bool bitmap_test_opaque(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- unsigned char *pixels;
- int pcount;
- int ploop;
-
- assert(gbitmap);
-
- pixels = cairo_image_surface_get_data(gbitmap->surface);
-
- pcount = cairo_image_surface_get_stride(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
-
- for (ploop = 3; ploop < pcount; ploop += 4) {
- if (pixels[ploop] != 0xff) {
- return false;
- }
- }
-
- return true;
+ gbitmap->opaque = opaque;
}
@@ -162,16 +97,8 @@ static bool bitmap_test_opaque(void *vbitmap)
static bool bitmap_get_opaque(void *vbitmap)
{
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- cairo_format_t fmt;
-
- assert(gbitmap);
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- if (fmt == CAIRO_FORMAT_RGB24) {
- return true;
- }
- return false;
+ return gbitmap->opaque;
}
@@ -187,83 +114,13 @@ static bool bitmap_get_opaque(void *vbitmap)
static unsigned char *bitmap_get_buffer(void *vbitmap)
{
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- int pixel_loop;
- int pixel_count;
uint8_t *pixels;
- uint32_t t, r, g, b;
- cairo_format_t fmt;
assert(gbitmap);
cairo_surface_flush(gbitmap->surface);
pixels = cairo_image_surface_get_data(gbitmap->surface);
- if (!gbitmap->converted)
- return pixels;
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- pixel_count = cairo_image_surface_get_width(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
-
- if (fmt == CAIRO_FORMAT_RGB24) {
- /* Opaque image */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- /* Cairo surface is ARGB, written in native endian */
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- b = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- r = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-#else
- t = pixels[4 * pixel_loop + 0];
- r = pixels[4 * pixel_loop + 1];
- g = pixels[4 * pixel_loop + 2];
- b = pixels[4 * pixel_loop + 3];
-#endif
-
- /* Core bitmaps always have a component order of rgba,
- * regardless of system endianness */
- pixels[4 * pixel_loop + 0] = r;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = b;
- pixels[4 * pixel_loop + 3] = t;
- }
- } else {
- /* Alpha image: de-multiply alpha */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- b = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- r = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-#else
- t = pixels[4 * pixel_loop + 0];
- r = pixels[4 * pixel_loop + 1];
- g = pixels[4 * pixel_loop + 2];
- b = pixels[4 * pixel_loop + 3];
-#endif
-
- if (t != 0) {
- r = (r << 8) / t;
- g = (g << 8) / t;
- b = (b << 8) / t;
-
- r = (r > 255) ? 255 : r;
- g = (g > 255) ? 255 : g;
- b = (b > 255) ? 255 : b;
- } else {
- r = g = b = 0;
- }
-
- pixels[4 * pixel_loop + 0] = r;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = b;
- pixels[4 * pixel_loop + 3] = t;
- }
- }
-
- gbitmap->converted = false;
-
return (unsigned char *) pixels;
}
@@ -284,22 +141,6 @@ static size_t bitmap_get_rowstride(void *vbitmap)
/**
- * Find the bytes per pixel of a bitmap
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return bytes per pixel
- */
-static size_t bitmap_get_bpp(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return 4;
-}
-
-
-
-/**
* Free a bitmap.
*
* \param vbitmap a bitmap, as returned by bitmap_create()
@@ -320,23 +161,6 @@ static void bitmap_destroy(void *vbitmap)
/**
- * Save a bitmap in the platform's native format.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \param path pathname for file
- * \param flags modify the behaviour of the save
- * \return true on success, false on error and error reported
- */
-static bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return false;
-}
-
-
-/**
* The bitmap image has changed, so flush any persistant cache.
*
* \param vbitmap a bitmap, as returned by bitmap_create()
@@ -344,81 +168,10 @@ static bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
static void bitmap_modified(void *vbitmap)
{
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- int pixel_loop;
- int pixel_count;
- uint8_t *pixels;
- uint32_t t, r, g, b;
- cairo_format_t fmt;
assert(gbitmap);
- fmt = cairo_image_surface_get_format(gbitmap->surface);
-
- pixel_count = cairo_image_surface_get_width(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
- pixels = cairo_image_surface_get_data(gbitmap->surface);
-
- if (gbitmap->converted) {
- cairo_surface_mark_dirty(gbitmap->surface);
- return;
- }
-
- if (fmt == CAIRO_FORMAT_RGB24) {
- /* Opaque image */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- /* Core bitmaps always have a component order of rgba,
- * regardless of system endianness */
- r = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- b = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-
- /* Cairo surface is ARGB, written in native endian */
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- pixels[4 * pixel_loop + 0] = b;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = r;
- pixels[4 * pixel_loop + 3] = t;
-#else
- pixels[4 * pixel_loop + 0] = t;
- pixels[4 * pixel_loop + 1] = r;
- pixels[4 * pixel_loop + 2] = g;
- pixels[4 * pixel_loop + 3] = b;
-#endif
- }
- } else {
- /* Alpha image: pre-multiply alpha */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- r = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- b = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-
- if (t != 0) {
- r = ((r * (t + 1)) >> 8) & 0xff;
- g = ((g * (t + 1)) >> 8) & 0xff;
- b = ((b * (t + 1)) >> 8) & 0xff;
- } else {
- r = g = b = 0;
- }
-
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- pixels[4 * pixel_loop + 0] = b;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = r;
- pixels[4 * pixel_loop + 3] = t;
-#else
- pixels[4 * pixel_loop + 0] = t;
- pixels[4 * pixel_loop + 1] = r;
- pixels[4 * pixel_loop + 2] = g;
- pixels[4 * pixel_loop + 3] = b;
-#endif
- }
- }
-
cairo_surface_mark_dirty(gbitmap->surface);
-
- gbitmap->converted = true;
}
/* exported interface documented in gtk/bitmap.h */
@@ -530,13 +283,10 @@ static struct gui_bitmap_table bitmap_table = {
.destroy = bitmap_destroy,
.set_opaque = bitmap_set_opaque,
.get_opaque = bitmap_get_opaque,
- .test_opaque = bitmap_test_opaque,
.get_buffer = bitmap_get_buffer,
.get_rowstride = bitmap_get_rowstride,
.get_width = nsgtk_bitmap_get_width,
.get_height = nsgtk_bitmap_get_height,
- .get_bpp = bitmap_get_bpp,
- .save = bitmap_save,
.modified = bitmap_modified,
.render = bitmap_render,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-24 03:20:39 +0000