Dogcows Code - chaz/rasterize/blob - pixmap.h

   1
   2 /*
   3  * CS5600 University of Utah
   4  * Charles McGarvey
   5  * mcgarvey@eng.utah.edu
   6  */
   7
   8 #ifndef __PIXMAP_H__
   9 #define __PIXMAP_H__
  10
  11 #include "color.h"
  12 #include "common.h"
  13 #include "tri.h"
  14
  15
  16 /*
  17  * A pixel map for storing and manipulating a 2D grid of color values.
  18  */
  19 typedef struct pixmap pixmap_t;
  20
  21
  22 /*
  23  * Create a new pixmap on the heap.
  24  */
  25 pixmap_t* pixmap_alloc(int width, int height, color_t fill);
  26
  27 /*
  28  * Free up the memory associated with the pixmap.
  29  */
  30 void pixmap_destroy(pixmap_t* p);
  31
  32
  33 /*
  34  * Fill the entire pixmap with a solid color.
  35  */
  36 void pixmap_clear(pixmap_t* p, color_t fill);
  37
  38
  39 /*
  40  * Set the viewport rectangle.  This effectively sets up a clipping rectangle
  41  * where nothing is drawn outside of the rectangle.  The default viewport is
  42  * [0, 0, width, height], or the entire pixmap area.
  43  */
  44 void pixmap_viewport(pixmap_t* p, int x, int y, int width, int height);
  45
  46 /*
  47  * Set the modelview matrix.  This positions the model or camera.
  48  */
  49 void pixmap_modelview(pixmap_t* p, const mat_t* transform);
  50
  51 /*
  52  * Set the projection matrix.  This provides the transformation matrix for
  53  * converting to screen space.
  54  */
  55 void pixmap_projection(pixmap_t* p, const mat_t* transform);
  56
  57
  58 /*
  59  * Save the pixmap to a PPM file.
  60  */
  61 int pixmap_export_ppm(const pixmap_t* p, const char* filename);
  62
  63 /*
  64  * Save the pixmap to a BMP file.
  65  */
  66 int pixmap_export_bmp(const pixmap_t* p, const char* filename);
  67
  68
  69 /*
  70  * Draw a smooth gradient triangle to the pixmap.
  71  */
  72 void pixmap_draw_tri(pixmap_t* p, const tri_t* triangle);
  73
  74
  75 #endif // __PIXMAP_H__
  76