1 files changed, 114 insertions, 0 deletions
diff --git a/matchblox/common/bitmap.c b/matchblox/common/bitmap.c
new file mode 100644
index 0000000..2d69bc9
--- /dev/null
+++ b/matchblox/common/bitmap.c
@@ -0,0 +1,114 @@
+#ifdef G_OS_WIN32
+  #define WIN32_LEAN_AND_MEAN 1
+  #include <windows.h>
+  #define GL_BGR  0x80E0
+  #define GL_BGRA 0x80E1
+  #define GL_CLAMP_TO_EDGE 0x812F
+#endif
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "bitmap.h"
+
+#define BITMAP_FILESIZE 0x02
+#define BITMAP_OFFSET 0x0a
+#define BITMAP_HEADERSIZE 0x0e
+#define BITMAP_WIDTH 0x12
+#define BITMAP_HEIGHT 0x16
+#define BITMAP_DEPTH 0x1c
+#define BITMAP_IMAGE_SIZE 0x22
+
+
+struct BitmapStruct BitmapLoad(char *filename)
+{
+  struct BitmapStruct l_sImage;
+  GLuint texture;
+  FILE *bitmap;
+
+  // try to open the file
+  bitmap = fopen(filename, "r");
+
+  // does the bitmap exist?
+  if (bitmap > 0)
+  {
+    unsigned int dataoffset, filesize, imagesize;
+    short depth;
+    GLsizei width, height;
+    unsigned char *imagedata;
+
+    fseek(bitmap, BITMAP_FILESIZE, SEEK_SET);
+    fread(&filesize, 4, 1, bitmap);
+    fseek(bitmap, BITMAP_OFFSET, SEEK_SET);
+    fread(&dataoffset, 4, 1, bitmap);
+    fseek(bitmap, BITMAP_WIDTH, SEEK_SET);
+    fread(&width, 4, 1, bitmap);
+    fread(&height, 4, 1, bitmap);
+    fseek(bitmap, BITMAP_DEPTH, SEEK_SET);
+    fread(&depth, 2, 1, bitmap);
+    fseek(bitmap, BITMAP_IMAGE_SIZE, SEEK_SET);
+    fread(&imagesize, 4, 1, bitmap);
+
+    imagedata = (unsigned char *)malloc((size_t)imagesize);
+
+    fseek(bitmap, dataoffset, SEEK_SET);
+    fread(imagedata, (size_t)imagesize, 1, bitmap);
+
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+
+    if (depth == 24) // 24 bits
+    {
+      gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, width, height, GL_BGR, GL_UNSIGNED_BYTE, imagedata);
+    }
+    else // depth == 32 bits
+    {
+      gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, width, height, GL_BGRA, GL_UNSIGNED_BYTE, imagedata);;
+    }
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
+	  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    l_sImage.m_iImageId = texture;
+    l_sImage.m_iWidth   = width;
+    l_sImage.m_iHeight  = height;
+
+    free(imagedata);
+    fclose(bitmap);
+
+    return l_sImage;
+  }
+  else
+  {
+    // couldn't find bitmap
+    exit(0);
+  }
+}
+
+
+void BitmapRender(int f_iXPos, int f_iYPos, int f_iWidth, int f_iHeight, int f_iImageId)
+{
+  glBindTexture(GL_TEXTURE_2D, f_iImageId);
+
+  glBegin(GL_TRIANGLE_STRIP);
+    glTexCoord2i(0, 1); glVertex2i(f_iXPos,            f_iYPos);
+    glTexCoord2i(1, 1); glVertex2i(f_iXPos + f_iWidth, f_iYPos);
+    glTexCoord2i(0, 0); glVertex2i(f_iXPos,            f_iYPos + f_iHeight);
+    glTexCoord2i(1, 0); glVertex2i(f_iXPos + f_iWidth, f_iYPos + f_iHeight);
+  glEnd();
+
+} // BitmapRender
+
+
+void BitmapConvertWidth(struct BitmapStruct *f_sImage, double f_dHeight)
+{
+  double l_dRatio;
+
+  l_dRatio = (double)f_sImage->m_iHeight / f_dHeight;
+  f_sImage->m_iWidth = (int)(f_sImage->m_iWidth / l_dRatio);
+
+} // ConvertButton