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-rw-r--r--minui/resources.c275
1 files changed, 132 insertions, 143 deletions
diff --git a/minui/resources.c b/minui/resources.c
index fe1e99926..ed25e45a2 100644
--- a/minui/resources.c
+++ b/minui/resources.c
@@ -47,143 +47,15 @@ double pow(double x, double y) {
return x * y;
}
-int res_create_surface(const char* name, gr_surface* pSurface) {
- char resPath[256];
- GGLSurface* surface = NULL;
- int result = 0;
- unsigned char header[8];
- png_structp png_ptr = NULL;
- png_infop info_ptr = NULL;
-
- *pSurface = NULL;
-
- snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name);
- resPath[sizeof(resPath)-1] = '\0';
- FILE* fp = fopen(resPath, "rb");
- if (fp == NULL) {
- result = -1;
- goto exit;
- }
-
- size_t bytesRead = fread(header, 1, sizeof(header), fp);
- if (bytesRead != sizeof(header)) {
- result = -2;
- goto exit;
- }
-
- if (png_sig_cmp(header, 0, sizeof(header))) {
- result = -3;
- goto exit;
- }
-
- png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (!png_ptr) {
- result = -4;
- goto exit;
- }
-
- info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr) {
- result = -5;
- goto exit;
- }
-
- if (setjmp(png_jmpbuf(png_ptr))) {
- result = -6;
- goto exit;
- }
-
- png_init_io(png_ptr, fp);
- png_set_sig_bytes(png_ptr, sizeof(header));
- png_read_info(png_ptr, info_ptr);
-
- int color_type, bit_depth;
- size_t width, height;
-
- png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,
- &color_type, NULL, NULL, NULL);
-
- png_byte channels = png_get_channels(png_ptr, info_ptr);
-
- if (!(bit_depth == 8 &&
- ((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) ||
- (channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) ||
- (channels == 1 && (color_type == PNG_COLOR_TYPE_PALETTE ||
- color_type == PNG_COLOR_TYPE_GRAY))))) {
- return -7;
- goto exit;
- }
-
- size_t stride = (color_type == PNG_COLOR_TYPE_GRAY ? 1 : 4) * width;
- size_t pixelSize = stride * height;
-
- surface = malloc(sizeof(GGLSurface) + pixelSize);
- if (surface == NULL) {
- result = -8;
- goto exit;
- }
- unsigned char* pData = (unsigned char*) (surface + 1);
- surface->version = sizeof(GGLSurface);
- surface->width = width;
- surface->height = height;
- surface->stride = width; /* Yes, pixels, not bytes */
- surface->data = pData;
- surface->format = (channels == 3) ? GGL_PIXEL_FORMAT_RGBX_8888 :
- ((color_type == PNG_COLOR_TYPE_PALETTE ? GGL_PIXEL_FORMAT_RGBA_8888 : GGL_PIXEL_FORMAT_L_8));
-
- int alpha = 0;
- if (color_type == PNG_COLOR_TYPE_PALETTE) {
- png_set_palette_to_rgb(png_ptr);
- }
- if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
- png_set_tRNS_to_alpha(png_ptr);
- alpha = 1;
- }
- if (color_type == PNG_COLOR_TYPE_GRAY) {
- alpha = 1;
- }
-
- unsigned int y;
- if (channels == 3 || (channels == 1 && !alpha)) {
- for (y = 0; y < height; ++y) {
- unsigned char* pRow = pData + y * stride;
- png_read_row(png_ptr, pRow, NULL);
-
- int x;
- for(x = width - 1; x >= 0; x--) {
- int sx = x * 3;
- int dx = x * 4;
- unsigned char r = pRow[sx];
- unsigned char g = pRow[sx + 1];
- unsigned char b = pRow[sx + 2];
- unsigned char a = 0xff;
- pRow[dx ] = r; // r
- pRow[dx + 1] = g; // g
- pRow[dx + 2] = b; // b
- pRow[dx + 3] = a;
- }
- }
- } else {
- for (y = 0; y < height; ++y) {
- unsigned char* pRow = pData + y * stride;
- png_read_row(png_ptr, pRow, NULL);
- }
- }
-
- *pSurface = (gr_surface) surface;
-
-exit:
- png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
-
- if (fp != NULL) {
- fclose(fp);
- }
- if (result < 0) {
- if (surface) {
- free(surface);
- }
- }
- return result;
+#define SURFACE_DATA_ALIGNMENT 8
+
+static GGLSurface* malloc_surface(size_t data_size) {
+ unsigned char* temp = malloc(sizeof(GGLSurface) + data_size + SURFACE_DATA_ALIGNMENT);
+ if (temp == NULL) return NULL;
+ GGLSurface* surface = (GGLSurface*) temp;
+ surface->data = temp + sizeof(GGLSurface) +
+ (SURFACE_DATA_ALIGNMENT - (sizeof(GGLSurface) % SURFACE_DATA_ALIGNMENT));
+ return surface;
}
static int open_png(const char* name, png_structp* png_ptr, png_infop* info_ptr,
@@ -270,6 +142,114 @@ static int open_png(const char* name, png_structp* png_ptr, png_infop* info_ptr,
return result;
}
+// "display" surfaces are transformed into the framebuffer's required
+// pixel format (currently only RGBX is supported) at load time, so
+// gr_blit() can be nothing more than a memcpy() for each row. The
+// next two functions are the only ones that know anything about the
+// framebuffer pixel format; they need to be modified if the
+// framebuffer format changes (but nothing else should).
+
+// Allocate and return a gr_surface sufficient for storing an image of
+// the indicated size in the framebuffer pixel format.
+static GGLSurface* init_display_surface(png_uint_32 width, png_uint_32 height) {
+ GGLSurface* surface;
+
+ surface = (GGLSurface*) malloc_surface(width * height * 4);
+ if (surface == NULL) return NULL;
+
+ surface->version = sizeof(GGLSurface);
+ surface->width = width;
+ surface->height = height;
+ surface->stride = width;
+
+ return surface;
+}
+
+// Copy 'input_row' to 'output_row', transforming it to the
+// framebuffer pixel format. The input format depends on the value of
+// 'channels':
+//
+// 1 - input is 8-bit grayscale
+// 3 - input is 24-bit RGB
+// 4 - input is 32-bit RGBA/RGBX
+//
+// 'width' is the number of pixels in the row.
+static void transform_rgb_to_draw(unsigned char* input_row,
+ unsigned char* output_row,
+ int channels, int width) {
+ int x;
+ unsigned char* ip = input_row;
+ unsigned char* op = output_row;
+
+ switch (channels) {
+ case 1:
+ // expand gray level to RGBX
+ for (x = 0; x < width; ++x) {
+ *op++ = *ip;
+ *op++ = *ip;
+ *op++ = *ip;
+ *op++ = 0xff;
+ ip++;
+ }
+ break;
+
+ case 3:
+ // expand RGBA to RGBX
+ for (x = 0; x < width; ++x) {
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = 0xff;
+ }
+ break;
+
+ case 4:
+ // copy RGBA to RGBX
+ memcpy(output_row, input_row, width*4);
+ break;
+ }
+}
+
+int res_create_surface(const char* name, gr_surface* pSurface) {
+ GGLSurface* surface = NULL;
+ int result = 0;
+ png_structp png_ptr = NULL;
+ png_infop info_ptr = NULL;
+ png_uint_32 width, height;
+ png_byte channels;
+
+ *pSurface = NULL;
+
+ result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
+ if (result < 0) return result;
+
+ surface = init_display_surface(width, height);
+ if (surface == NULL) {
+ result = -8;
+ goto exit;
+ }
+
+ unsigned char* p_row = malloc(width * 4);
+ unsigned int y;
+ for (y = 0; y < height; ++y) {
+ png_read_row(png_ptr, p_row, NULL);
+ transform_rgb_to_draw(p_row, surface->data + y * width * 4, channels, width);
+ }
+ free(p_row);
+
+ if (channels == 3)
+ surface->format = GGL_PIXEL_FORMAT_RGBX_8888;
+ else
+ surface->format = GGL_PIXEL_FORMAT_RGBA_8888;
+
+ *pSurface = (gr_surface) surface;
+
+ exit:
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ if (result < 0 && surface != NULL) free(surface);
+ return result;
+}
+
int res_create_multi_display_surface(const char* name, int* frames, gr_surface** pSurface) {
gr_surface* surface = NULL;
int result = 0;
@@ -304,29 +284,38 @@ int res_create_multi_display_surface(const char* name, int* frames, gr_surface**
goto exit;
}
- surface = malloc(*frames * sizeof(gr_surface));
+ surface = malloc(*frames * sizeof(GGLSurface));
if (surface == NULL) {
result = -8;
goto exit;
}
for (i = 0; i < *frames; ++i) {
- surface[i] = NULL;//init_display_surface(width, height / *frames);
+ surface[i] = init_display_surface(width, height / *frames);
if (surface[i] == NULL) {
result = -8;
goto exit;
}
}
- /*unsigned char* p_row = malloc(width * 4);
+ unsigned char* p_row = malloc(width * 4);
unsigned int y;
for (y = 0; y < height; ++y) {
png_read_row(png_ptr, p_row, NULL);
int frame = y % *frames;
- unsigned char* out_row = surface[frame]->data +
- (y / *frames) * surface[frame]->row_bytes;
+ GGLSurface* p = (GGLSurface*) surface[frame];
+ unsigned char* out_row = p->data +
+ (y / *frames) * width * 4;
transform_rgb_to_draw(p_row, out_row, channels, width);
}
- free(p_row); this will need to be brought in line with the older resources and graphics code */
+ free(p_row);
+
+ for (i = 0; i < *frames; ++i) {
+ GGLSurface* p = (GGLSurface*) surface[i];
+ if (channels == 3)
+ p->format = GGL_PIXEL_FORMAT_RGBX_8888;
+ else
+ p->format = GGL_PIXEL_FORMAT_RGBA_8888;
+ }
*pSurface = (gr_surface*) surface;