PNG loading works

2016-01-02 20:48:28 +01:00
parent 826eb2569c
commit 03c9b2c4a2
3 changed files with 80 additions and 20 deletions
@@ -1,23 +1,23 @@
-/*
- * Copyright (C) OpenTX
- *
- * Based on code named
- *   th9x - http://code.google.com/p/th9x 
- *   er9x - http://code.google.com/p/er9x
- *   gruvin9x - http://code.google.com/p/gruvin9x
- *
- * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
+/*
+ * Copyright (C) OpenTX
+ *
+ * Based on code named
+ *   th9x - http://code.google.com/p/th9x 
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 #include "opentx.h"

 #if defined(PCBTARANIS)
@@ -422,3 +422,51 @@ const char *writeScreenshot()

  return NULL;
 }
+
+
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_ONLY_PNG
+#include "thirdparty/Stb/stb_image.h"
+
+
+const char * pngLoad(uint8_t * bmp, const char * filename, uint16_t width, uint16_t height)
+{
+  int x,y,n;
+  unsigned char *data = stbi_load(filename, &x, &y, &n, 3);
+  if (!data) {
+    return "stb error";
+  }
+
+  //convert to 565 fromat
+  // todo use dma2d for conversion from 888 to 565
+  unsigned char *p = data;
+  uint16_t * dest = (uint16_t *)bmp;
+
+  *dest++ = min<int>(width, x);
+  *dest++ = min<int>(height, y);
+
+  for(int row = 0; row < min<int>(height, y); ++row) {
+    unsigned char *l = p;
+    for(int col = 0; col < min<int>(width, x); ++col) {
+      *dest = RGB(l[0], l[1], l[2]);
+      ++dest;
+      l += 3;
+    }
+    p += 3 * x;
+  }
+  stbi_image_free(data);
+  return 0;
+//    // ... process data if not NULL ...
+//    // ... x = width, y = height, n = # 8-bit components per pixel ...
+//    // ... replace '0' with '1'..'4' to force that many components per pixel
+//    // ... but 'n' will always be the number that it would have been if you said 0
+//    stbi_image_free(data)
+//
+// Standard parameters:
+//    int *x       -- outputs image width in pixels
+//    int *y       -- outputs image height in pixels
+//    int *comp    -- outputs # of image components in image file
+//    int req_comp -- if non-zero, # of image components requested in result
+
+
+}