1.1 --- a/src/pvr2/render.c	Tue Jan 01 05:08:38 2008 +0000
     1.2 +++ b/src/pvr2/render.c	Thu Feb 14 14:06:41 2008 +0000
     1.3 @@ -18,6 +18,7 @@
     1.4  
     1.5  #include <sys/time.h>
     1.6  #include <time.h>
     1.7 +#include <math.h>
     1.8  #include "pvr2/pvr2.h"
     1.9  #include "asic.h"
    1.10  
    1.11 @@ -79,7 +80,7 @@
    1.12   * Prepare the OpenGL context to receive instructions for a new frame.
    1.13   */
    1.14  static void pvr2_render_prepare_context( render_buffer_t buffer,
    1.15 -					 float bgplanez, float nearz ) 
    1.16 +					 float nearz, float farz )
    1.17  {
    1.18      /* Select and initialize the render context */
    1.19      display_driver->set_render_target(buffer);
    1.20 @@ -95,7 +96,7 @@
    1.21      glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
    1.22      glMatrixMode(GL_PROJECTION);
    1.23      glLoadIdentity();
    1.24 -    glOrtho( 0, buffer->width, buffer->height, 0, -bgplanez, -nearz );
    1.25 +    glOrtho( 0, buffer->width, buffer->height, 0, -nearz, -farz );
    1.26      glMatrixMode(GL_MODELVIEW);
    1.27      glLoadIdentity();
    1.28      glCullFace( GL_BACK );
    1.29 @@ -121,8 +122,10 @@
    1.30  
    1.31      gettimeofday(&tva, NULL);
    1.32  
    1.33 -    float bgplanez = 1/MMIO_READF( PVR2, RENDER_FARCLIP );
    1.34 -    pvr2_render_prepare_context( buffer, bgplanez, 0 );
    1.35 +    float farz, nearz;
    1.36 +    pvr2_render_find_z_range( &nearz, &farz );
    1.37 +    float bgplanez = MMIO_READF( PVR2, RENDER_FARCLIP );
    1.38 +    pvr2_render_prepare_context( buffer, nearz, farz );
    1.39  
    1.40      int clip_x = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
    1.41      int clip_y = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;