gl: clear w, h on reinit

[libpicofe.git] / readpng.c

diff --git a/readpng.c b/readpng.c
index cad1217..ac24dd4 100644 (file)
--- a/readpng.c
+++ b/readpng.c
@@ -5,6 +5,7 @@
  * (at your option):
  *  - GNU GPL, version 2 or later.
  *  - GNU LGPL, version 2.1 or later.
+ *  - MAME license.
  * See the COPYING file in the top-level directory.
  */
 
@@ -60,29 +61,37 @@ int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req
                goto done;
        }
 
-       // lprintf("%s: %ix%i @ %ibpp\n", fname, (int)info_ptr->width, (int)info_ptr->height, info_ptr->pixel_depth);
+       // lprintf("%s: %ix%i @ %ibpp\n", fname, (int)png_get_image_width(png_ptr, info_ptr),
+       //      (int)png_get_image_height(png_ptr, info_ptr), png_get_bit_depth(png_ptr, info_ptr));
 
        switch (what)
        {
                case READPNG_BG:
                {
-                       int height, width, h;
+                       int height, width, h, x_ofs = 0, y_ofs = 0;
                        unsigned short *dst = dest;
-                       if (info_ptr->pixel_depth != 24)
+
+                       if (png_get_bit_depth(png_ptr, info_ptr) != 8)
                        {
-                               lprintf(__FILE__ ": bg image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
+                               lprintf(__FILE__ ": bg image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
                                break;
                        }
-                       height = info_ptr->height;
-                       if (height > req_h)
-                               height = req_h;
-                       width = info_ptr->width;
-                       if (width > req_w)
+                       width = png_get_image_width(png_ptr, info_ptr);
+                       if (width > req_w) {
+                               x_ofs = (width - req_w) / 2;
                                width = req_w;
+                       } else
+                               dst += (req_w - width) / 2;
+                       height = png_get_image_height(png_ptr, info_ptr);
+                       if (height > req_h) {
+                               y_ofs = (height - req_h) / 2;
+                               height = req_h;
+                       } else
+                               dst += (req_h - height) / 2 * req_w;
 
                        for (h = 0; h < height; h++)
                        {
-                               unsigned char *src = row_ptr[h];
+                               unsigned char *src = row_ptr[h + y_ofs] + x_ofs * 3;
                                int len = width;
                                while (len--)
                                {
@@ -102,15 +111,15 @@ int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req
                {
                        int x, y, x1, y1;
                        unsigned char *dst = dest;
-                       if (info_ptr->width != req_w || info_ptr->height != req_h)
+                       if (png_get_image_width(png_ptr, info_ptr) != req_w || png_get_image_height(png_ptr, info_ptr) != req_h)
                        {
                                lprintf(__FILE__ ": unexpected font image size %dx%d, needed %dx%d\n",
-                                       (int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
+                                       (int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
                                break;
                        }
-                       if (info_ptr->pixel_depth != 8)
+                       if (png_get_bit_depth(png_ptr, info_ptr) != 8)
                        {
-                               lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
+                               lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
                                break;
                        }
                        for (y = 0; y < 16; y++)
@@ -135,15 +144,15 @@ int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req
                {
                        int x1, y1;
                        unsigned char *dst = dest;
-                       if (info_ptr->width != req_w || info_ptr->height != req_h)
+                       if (png_get_image_width(png_ptr, info_ptr) != req_w || png_get_image_height(png_ptr, info_ptr) != req_h)
                        {
                                lprintf(__FILE__ ": unexpected selector image size %ix%i, needed %dx%d\n",
-                                       (int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
+                                       (int)png_get_image_width(png_ptr, info_ptr), (int)png_get_image_height(png_ptr, info_ptr), req_w, req_h);
                                break;
                        }
-                       if (info_ptr->pixel_depth != 8)
+                       if (png_get_bit_depth(png_ptr, info_ptr) != 8)
                        {
-                               lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
+                               lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", png_get_bit_depth(png_ptr, info_ptr));
                                break;
                        }
                        for (y1 = 0; y1 < req_h; y1++)
@@ -159,17 +168,17 @@ int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req
                {
                        int height, width, h;
                        unsigned char *dst = dest;
-                       if (info_ptr->pixel_depth != 24)
+                       if (png_get_bit_depth(png_ptr, info_ptr) != 8)
                        {
-                               lprintf(__FILE__ ": image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
+                               lprintf(__FILE__ ": image uses %ibpc, needed 8bpc\n", png_get_bit_depth(png_ptr, info_ptr));
                                break;
                        }
-                       height = info_ptr->height;
-                       if (height > req_h)
-                               height = req_h;
-                       width = info_ptr->width;
+                       width = png_get_image_width(png_ptr, info_ptr);
                        if (width > req_w)
                                width = req_w;
+                       height = png_get_image_height(png_ptr, info_ptr);
+                       if (height > req_h)
+                               height = req_h;
 
                        for (h = 0; h < height; h++)
                        {