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graphics: basic tga loading support so we can see our own screenshots

This commit is contained in:
K. Lange 2019-01-03 19:36:33 +09:00
parent 07c02fb4a4
commit 8680381ecc
2 changed files with 103 additions and 36 deletions
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4
apps/file-browser.c
View File

@ -603,6 +603,10 @@ static void load_directory(const char * path, int modifies_history) {
sprintf(f->icon, "image");
sprintf(f->launcher, "exec imgviewer");
sprintf(f->filetype, "Bitmap Image");
} else if (has_extension(f, ".tga")) {
sprintf(f->icon, "image");
sprintf(f->launcher, "exec imgviewer");
sprintf(f->filetype, "Targa Image");
} else if (has_extension(f, ".jpg") || has_extension(f,".jpeg")) {
sprintf(f->icon, "image");
sprintf(f->launcher, "exec imgviewer");

135
lib/graphics.c
View File

@ -405,48 +405,111 @@ void load_sprite(sprite_t * sprite, char * filename) {
/* Alright, we have the length */
char * bufferb = malloc(image_size);
fread(bufferb, image_size, 1, image);
uint16_t x = 0; /* -> 212 */
uint16_t y = 0; /* -> 68 */
/* Get the width / height of the image */
signed int *bufferi = (signed int *)((uintptr_t)bufferb + 2);
uint32_t width = bufferi[4];
uint32_t height = bufferi[5];
uint16_t bpp = bufferi[6] / 0x10000;
uint32_t row_width = (bpp * width + 31) / 32 * 4;
/* Skip right to the important part */
size_t i = bufferi[2];
sprite->width = width;
sprite->height = height;
sprite->bitmap = malloc(sizeof(uint32_t) * width * height);
sprite->masks = NULL;
if (bufferb[0] == 'B' && bufferb[1] == 'M') {
/* Bitmaps */
uint16_t x = 0; /* -> 212 */
uint16_t y = 0; /* -> 68 */
/* Get the width / height of the image */
signed int *bufferi = (signed int *)((uintptr_t)bufferb + 2);
uint32_t width = bufferi[4];
uint32_t height = bufferi[5];
uint16_t bpp = bufferi[6] / 0x10000;
uint32_t row_width = (bpp * width + 31) / 32 * 4;
/* Skip right to the important part */
size_t i = bufferi[2];
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
if (i > image_size) goto _cleanup_sprite;
/* Extract the color */
uint32_t color;
if (bpp == 24) {
color = (bufferb[i + 3 * x] & 0xFF) +
(bufferb[i+1 + 3 * x] & 0xFF) * 0x100 +
(bufferb[i+2 + 3 * x] & 0xFF) * 0x10000 + 0xFF000000;
} else if (bpp == 32) {
if (bufferb[i + 4 * x] == 0) {
color = 0x000000;
sprite->width = width;
sprite->height = height;
sprite->bitmap = malloc(sizeof(uint32_t) * width * height);
sprite->masks = NULL;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
if (i > image_size) goto _cleanup_sprite;
/* Extract the color */
uint32_t color;
if (bpp == 24) {
color = (bufferb[i + 3 * x] & 0xFF) +
(bufferb[i+1 + 3 * x] & 0xFF) * 0x100 +
(bufferb[i+2 + 3 * x] & 0xFF) * 0x10000 + 0xFF000000;
} else if (bpp == 32) {
if (bufferb[i + 4 * x] == 0) {
color = 0x000000;
} else {
color = (bufferb[i + 4 * x] & 0xFF) * 0x1000000 +
(bufferb[i+1 + 4 * x] & 0xFF) * 0x1 +
(bufferb[i+2 + 4 * x] & 0xFF) * 0x100 +
(bufferb[i+3 + 4 * x] & 0xFF) * 0x10000;
color = premultiply(color);
}
} else {
color = (bufferb[i + 4 * x] & 0xFF) * 0x1000000 +
(bufferb[i+1 + 4 * x] & 0xFF) * 0x1 +
(bufferb[i+2 + 4 * x] & 0xFF) * 0x100 +
(bufferb[i+3 + 4 * x] & 0xFF) * 0x10000;
color = premultiply(color);
color = rgb(bufferb[i + x],bufferb[i + x],bufferb[i + x]); /* Unsupported */
}
} else {
color = rgb(bufferb[i + x],bufferb[i + x],bufferb[i + x]); /* Unsupported */
/* Set our point */
sprite->bitmap[(height - y - 1) * width + x] = color;
}
/* Set our point */
sprite->bitmap[(height - y - 1) * width + x] = color;
i += row_width;
}
i += row_width;
} else {
/* Assume targa; limited support */
struct Header {
uint8_t id_length;
uint8_t color_map_type;
uint8_t image_type;
uint16_t color_map_first_entry;
uint16_t color_map_length;
uint8_t color_map_entry_size;
uint16_t x_origin;
uint16_t y_origin;
uint16_t width;
uint16_t height;
uint8_t depth;
uint8_t descriptor;
} __attribute__((packed));
struct Header * header = (struct Header *)bufferb;
if (header->id_length || header->color_map_type || (header->image_type != 2)) {
/* Unable to parse */
goto _cleanup_sprite;
}
sprite->width = header->width;
sprite->height = header->height;
sprite->bitmap = malloc(sizeof(uint32_t) * sprite->width * sprite->height);
sprite->masks = NULL;
uint16_t x = 0;
uint16_t y = 0;
int i = sizeof(struct Header);
if (header->depth == 24) {
for (y = 0; y < sprite->height; ++y) {
for (x = 0; x < sprite->width; ++x) {
uint32_t color = rgb(
bufferb[i+2 + 3 * x],
bufferb[i+1 + 3 * x],
bufferb[i + 3 * x]);
sprite->bitmap[(sprite->height - y - 1) * sprite->width + x] = color;
}
i += sprite->width * 3;
}
} else if (header->depth == 32) {
for (y = 0; y < sprite->height; ++y) {
for (x = 0; x < sprite->width; ++x) {
uint32_t color = rgba(
bufferb[i+2 + 4 * x],
bufferb[i+1 + 4 * x],
bufferb[i + 4 * x],
bufferb[i+3 + 4 * x]);
sprite->bitmap[(sprite->height - y - 1) * sprite->width + x] = color;
}
i += sprite->width * 4;
}
}
}
_cleanup_sprite: