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authorBrian <brian.paul@tungstengraphics.com>2008-03-28 18:41:10 -0600
committerBrian <brian.paul@tungstengraphics.com>2008-03-28 18:41:10 -0600
commit737e34aee598f32f8ff078ba823ed149b282ebc8 (patch)
treef116432977546a1eae1d451f81db19e0078533b4 /src
parentf6908a766dce645d610ff04bb49eaa8c5ee9e65a (diff)
gallium: begin some bounding box code for bitmap cache
Diffstat (limited to 'src')
-rw-r--r--src/mesa/state_tracker/st_cb_bitmap.c72
1 files changed, 52 insertions, 20 deletions
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index b600b92dc6..ec56b25f7c 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -73,12 +73,14 @@ static GLboolean UseBitmapCache = GL_TRUE;
struct bitmap_cache
{
- /** An I8 texture image: */
- GLubyte buffer[BITMAP_CACHE_HEIGHT][BITMAP_CACHE_WIDTH];
- GLboolean empty;
/** Window pos to render the cached image */
GLint xpos, ypos;
+ /** Bounds of region used in window coords */
+ GLint xmin, ymin, xmax, ymax;
struct pipe_texture *texture;
+ GLboolean empty;
+ /** An I8 texture image: */
+ GLubyte buffer[BITMAP_CACHE_HEIGHT][BITMAP_CACHE_WIDTH];
};
@@ -493,6 +495,18 @@ draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z,
}
+static void
+reset_cache(struct st_context *st)
+{
+ memset(st->bitmap.cache->buffer, 0, sizeof(st->bitmap.cache->buffer));
+ st->bitmap.cache->empty = GL_TRUE;
+
+ st->bitmap.cache->xmin = 1000000;
+ st->bitmap.cache->xmax = -1000000;
+ st->bitmap.cache->ymin = 1000000;
+ st->bitmap.cache->ymax = -1000000;
+}
+
static void
init_bitmap_cache(struct st_context *st)
@@ -523,7 +537,7 @@ init_bitmap_cache(struct st_context *st)
return;
}
- st->bitmap.cache->empty = GL_TRUE;
+ reset_cache(st);
}
@@ -534,29 +548,37 @@ void
st_flush_bitmap_cache(struct st_context *st)
{
if (!st->bitmap.cache->empty) {
+ struct bitmap_cache *cache = st->bitmap.cache;
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
struct pipe_surface *surf;
void *dest;
+ assert(cache->xmin <= cache->xmax);
+ /*
+ printf("flush size %d x %d at %d, %d\n",
+ cache->xmax - cache->xmin,
+ cache->ymax - cache->ymin,
+ cache->xpos, cache->ypos);
+ */
+
/* update the texture map image */
- surf = screen->get_tex_surface(screen, st->bitmap.cache->texture, 0, 0, 0);
+ surf = screen->get_tex_surface(screen, cache->texture, 0, 0, 0);
dest = pipe_surface_map(surf);
- memcpy(dest, st->bitmap.cache->buffer, sizeof(st->bitmap.cache->buffer));
+ memcpy(dest, cache->buffer, sizeof(cache->buffer));
pipe_surface_unmap(surf);
pipe_surface_reference(&surf, NULL);
- pipe->texture_update(pipe, st->bitmap.cache->texture, 0, 0x1);
+ pipe->texture_update(pipe, cache->texture, 0, 0x1);
draw_bitmap_quad(st->ctx,
- st->bitmap.cache->xpos,
- st->bitmap.cache->ypos,
+ cache->xpos,
+ cache->ypos,
st->ctx->Current.RasterPos[2],
BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT,
- st->bitmap.cache->texture);
+ cache->texture);
- memset(st->bitmap.cache->buffer, 0, sizeof(st->bitmap.cache->buffer));
- st->bitmap.cache->empty = GL_TRUE;
+ reset_cache(st);
}
}
@@ -571,6 +593,7 @@ accum_bitmap(struct st_context *st,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap )
{
+ struct bitmap_cache *cache = st->bitmap.cache;
int row, col;
int px = -999, py;
@@ -578,9 +601,9 @@ accum_bitmap(struct st_context *st,
height > BITMAP_CACHE_HEIGHT)
return GL_FALSE; /* too big to cache */
- if (!st->bitmap.cache->empty) {
- px = x - st->bitmap.cache->xpos; /* pos in buffer */
- py = y - st->bitmap.cache->ypos;
+ if (!cache->empty) {
+ px = x - cache->xpos; /* pos in buffer */
+ py = y - cache->ypos;
if (px < 0 || px + width > BITMAP_CACHE_WIDTH ||
py < 0 || py + height > BITMAP_CACHE_HEIGHT) {
/* This bitmap would extend beyond cache bounds,
@@ -590,20 +613,29 @@ accum_bitmap(struct st_context *st,
}
}
- if (st->bitmap.cache->empty) {
+ if (cache->empty) {
/* Initialize. Center bitmap vertically in the buffer. */
px = 0;
py = (BITMAP_CACHE_HEIGHT - height) / 2;
- st->bitmap.cache->xpos = x;
- st->bitmap.cache->ypos = y - py;
- st->bitmap.cache->empty = GL_FALSE;
+ cache->xpos = x;
+ cache->ypos = y - py;
+ cache->empty = GL_FALSE;
}
assert(px != -999);
+ if (x < cache->xmin)
+ cache->xmin = x;
+ if (y < cache->ymin)
+ cache->ymin = y;
+ if (x + width > cache->xmax)
+ cache->xmax = x + width;
+ if (y + height > cache->ymax)
+ cache->ymax = y + height;
+
/* XXX try to combine this code with code in make_bitmap_texture() */
#define SET_PIXEL(COL, ROW) \
- st->bitmap.cache->buffer[py + (ROW)][px + (COL)] = 0xff;
+ cache->buffer[py + (ROW)][px + (COL)] = 0xff;
for (row = 0; row < height; row++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,