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Screenshot utility (testing/brokenish)

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This commit is contained in:
Kevin Lange 2012-09-29 00:38:11 -07:00
parent 5e218b1272
commit ac997d0a48
2 changed files with 67 additions and 0 deletions
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14
userspace/compositor.c
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@ -40,6 +40,7 @@ void spin_unlock(int volatile * lock) {
window_t * windows[0x10000];
volatile uint8_t screenshot_next_frame = 0;
sprite_t * sprites[128];
@ -1131,6 +1132,9 @@ void * process_requests(void * garbage) {
#if 1
if (packet->buttons & MOUSE_BUTTON_MIDDLE) {
printf("middle click @%dx%d!\n", mouse_x / MOUSE_SCALE, mouse_y / MOUSE_SCALE);
screenshot_next_frame = 1;
printf("Screenshot, plz?\n");
#if 0
window_t * focused = focused_window();
if (focused) {
if (focused->z != 0 && focused->z != 0xFFFF) {
@ -1138,6 +1142,7 @@ void * process_requests(void * garbage) {
}
redraw_region_slow(0,0,ctx->width,ctx->height);
}
#endif
}
#endif
#endif
@ -1169,6 +1174,15 @@ void * redraw_thread(void * derp) {
redraw_cursor();
spin_unlock(&am_drawing);
flip(ctx);
if (screenshot_next_frame) {
screenshot_next_frame = 0;
printf("Going for screenshot...\n");
FILE * screenshot = fopen("/usr/share/screenshot.png", "w");
context_to_png(screenshot, ctx);
fclose(screenshot);
}
syscall_yield();
}
}

53
userspace/lib/graphics.c
View File

@ -215,6 +215,59 @@ int load_sprite_png(sprite_t * sprite, char * file) {
}
void context_to_png(FILE * file, gfx_context_t * ctx) {
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
int32_t x, y;
png_byte ** row_pointers = NULL;
int status = -1;
int depth = 8;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info_ptr = png_create_info_struct(png_ptr);
if (setjmp(png_jmpbuf(png_ptr))) {
goto png_write_failure;
}
png_set_IHDR(png_ptr, info_ptr,
ctx->width, ctx->height, depth,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
row_pointers = png_malloc(png_ptr, ctx->height * sizeof(png_byte *));
for (y = 0; y < ctx->height; ++y) {
png_byte * row = png_malloc(png_ptr, sizeof(uint8_t) * ctx->width * sizeof(uint32_t));
row_pointers[y] = row;
for (x = 0; x < ctx->width; ++x) {
uint32_t pixel = GFX(ctx, x, y);
*row++ = _RED(pixel);
*row++ = _GRE(pixel);
*row++ = _BLU(pixel);
*row++ = _ALP(pixel);
}
}
png_init_io(png_ptr, file);
png_set_rows(png_ptr, info_ptr, row_pointers);
png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
for (y = 0; y < ctx->height; y++) {
png_free(png_ptr, row_pointers[y]);
}
png_free(png_ptr, row_pointers);
fprintf(stderr, "Done writing PNG.\n");
return;
png_write_failure:
fprintf(stderr, "There was an exception while trying to write out a PNG file :(\n");
return;
}
static inline int32_t min(int32_t a, int32_t b) {
return (a < b) ? a : b;
}