src/gallium/drivers/i965/brw_pipe_fb.c

   1 #include "util/u_math.h"
   2 #include "pipe/p_context.h"
   3 #include "pipe/p_state.h"
   4 #include "util/u_inlines.h"
   5
   6 #include "brw_context.h"
   7
   8 /**
   9  * called from intelDrawBuffer()
  10  */
  11 static void brw_set_framebuffer_state( struct pipe_context *pipe,
  12                                        const struct pipe_framebuffer_state *fb )
  13 {
  14    struct brw_context *brw = brw_context(pipe);
  15    unsigned i;
  16
  17    /* Dimensions:
  18     */
  19    if (brw->curr.fb.width != fb->width ||
  20        brw->curr.fb.height != fb->height) {
  21       brw->curr.fb.width = fb->width;
  22       brw->curr.fb.height = fb->height;
  23       brw->state.dirty.mesa |= PIPE_NEW_FRAMEBUFFER_DIMENSIONS;
  24    }
  25
  26    /* Z/Stencil
  27     */
  28    if (brw->curr.fb.zsbuf != fb->zsbuf) {
  29       pipe_surface_reference(&brw->curr.fb.zsbuf, fb->zsbuf);
  30       brw->state.dirty.mesa |= PIPE_NEW_DEPTH_BUFFER;
  31    }
  32
  33    /* Color buffers:
  34     */
  35    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  36       if (brw->curr.fb.cbufs[i] != fb->cbufs[i]) {
  37          brw->state.dirty.mesa |= PIPE_NEW_COLOR_BUFFERS;
  38          pipe_surface_reference(&brw->curr.fb.cbufs[i], fb->cbufs[i]);
  39       }
  40    }
  41
  42    if (brw->curr.fb.nr_cbufs != fb->nr_cbufs) {
  43       brw->curr.fb.nr_cbufs = MIN2(BRW_MAX_DRAW_BUFFERS, fb->nr_cbufs);
  44       brw->state.dirty.mesa |= PIPE_NEW_NR_CBUFS;
  45    }
  46 }
  47
  48
  49 static void brw_set_viewport_state( struct pipe_context *pipe,
  50                                     const struct pipe_viewport_state *viewport )
  51 {
  52    struct brw_context *brw = brw_context(pipe);
  53
  54    brw->curr.viewport = *viewport;
  55    brw->curr.ccv.min_depth = viewport->scale[2] * -1.0 + viewport->translate[2];
  56    brw->curr.ccv.max_depth = viewport->scale[2] *  1.0 + viewport->translate[2];
  57
  58    if (0)
  59       debug_printf("%s depth range %f .. %f\n",
  60                    __FUNCTION__,
  61                    brw->curr.ccv.min_depth,
  62                    brw->curr.ccv.max_depth);
  63
  64    brw->state.dirty.mesa |= PIPE_NEW_VIEWPORT;
  65 }
  66
  67
  68 void brw_pipe_framebuffer_init( struct brw_context *brw )
  69 {
  70    brw->base.set_framebuffer_state = brw_set_framebuffer_state;
  71    brw->base.set_viewport_state = brw_set_viewport_state;
  72 }
  73
  74 void brw_pipe_framebuffer_cleanup( struct brw_context *brw )
  75 {
  76    struct pipe_framebuffer_state *fb = &brw->curr.fb;
  77    int i;
  78
  79    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  80       pipe_surface_reference(&fb->cbufs[i], NULL);
  81    }
  82
  83    pipe_surface_reference(&fb->zsbuf, NULL);
  84 }