diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast.c | 30 | ||||
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast.h | 5 | ||||
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_setup_context.h | 6 | ||||
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_setup_tri.c | 26 |
4 files changed, 54 insertions, 13 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast.c b/src/gallium/drivers/llvmpipe/lp_rast.c index 32cd5e09f5..09495f6288 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast.c +++ b/src/gallium/drivers/llvmpipe/lp_rast.c @@ -51,6 +51,10 @@ struct lp_rasterizer *lp_rast_create( struct pipe_screen *screen ) } +/** + * Begin the rasterization phase. + * Map the framebuffer surfaces. Initialize the 'rast' state. + */ boolean lp_rast_begin( struct lp_rasterizer *rast, struct pipe_surface *cbuf, struct pipe_surface *zsbuf, @@ -95,6 +99,10 @@ boolean lp_rast_begin( struct lp_rasterizer *rast, } +/** + * Finish the rasterization phase. + * Unmap framebuffer surfaces. + */ void lp_rast_end( struct lp_rasterizer *rast ) { struct pipe_screen *screen = rast->screen; @@ -120,7 +128,10 @@ void lp_rast_end( struct lp_rasterizer *rast ) -/* Begining of each tile: +/** + * Begining rasterization of a tile. + * \param x window X position of the tile, in pixels + * \param y window Y position of the tile, in pixels */ void lp_rast_start_tile( struct lp_rasterizer *rast, unsigned x, @@ -132,6 +143,10 @@ void lp_rast_start_tile( struct lp_rasterizer *rast, rast->y = y; } + +/** + * Clear the rasterizer's current color tile. + */ void lp_rast_clear_color( struct lp_rasterizer *rast, const union lp_rast_cmd_arg arg ) { @@ -157,6 +172,10 @@ void lp_rast_clear_color( struct lp_rasterizer *rast, } } + +/** + * Clear the rasterizer's current z/stencil tile. + */ void lp_rast_clear_zstencil( struct lp_rasterizer *rast, const union lp_rast_cmd_arg arg) { @@ -307,6 +326,9 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast, */ +/** + * Write the rasterizer's color tile to the framebuffer. + */ static void lp_rast_store_color( struct lp_rasterizer *rast ) { const unsigned x = rast->x; @@ -331,6 +353,9 @@ static void lp_rast_store_color( struct lp_rasterizer *rast ) } +/** + * Write the rasterizer's z/stencil tile to the framebuffer. + */ static void lp_rast_store_zstencil( struct lp_rasterizer *rast ) { RAST_DEBUG("%s\n", __FUNCTION__); @@ -339,6 +364,9 @@ static void lp_rast_store_zstencil( struct lp_rasterizer *rast ) } +/** + * Write the rasterizer's tiles to the framebuffer. + */ void lp_rast_end_tile( struct lp_rasterizer *rast ) { RAST_DEBUG("%s\n", __FUNCTION__); diff --git a/src/gallium/drivers/llvmpipe/lp_rast.h b/src/gallium/drivers/llvmpipe/lp_rast.h index 282b9a46d1..a50b73b27f 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast.h +++ b/src/gallium/drivers/llvmpipe/lp_rast.h @@ -79,6 +79,7 @@ struct lp_rast_shader_inputs { * plus inputs to run the shader: */ struct lp_rast_triangle { + /* bounding box of tri (in pixels) */ int minx; int maxx; int miny; @@ -94,12 +95,12 @@ struct lp_rast_triangle { int eo2; int eo3; - /* y deltas for vertex pairs */ + /* y deltas for vertex pairs (in fixed pt) */ int dy12; int dy23; int dy31; - /* x deltas for vertex pairs */ + /* x deltas for vertex pairs (in fixed pt) */ int dx12; int dx23; int dx31; diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h index 938f6ce262..3209e41c01 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_context.h +++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h @@ -87,6 +87,7 @@ struct setup_context { struct cmd_block_list tile[TILES_X][TILES_Y]; struct data_block_list data; + /* size of framebuffer, in tiles */ unsigned tiles_x; unsigned tiles_y; @@ -154,6 +155,11 @@ void lp_setup_choose_point( struct setup_context *setup ); void lp_setup_new_data_block( struct data_block_list *list ); void lp_setup_new_cmd_block( struct cmd_block_list *list ); + +/** + * Allocate space for a command/data in the given block list. + * Grow the block list if needed. + */ static INLINE void *get_data( struct data_block_list *list, unsigned size) { diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c index f2665c11df..cf86255406 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c @@ -230,6 +230,11 @@ static inline int subpixel_snap( float a ) #define MIN3(a,b,c) MIN2(MIN2(a,b),c) #define MAX3(a,b,c) MAX2(MAX2(a,b),c) +/** + * Do basic setup for triangle rasterization and determine which + * framebuffer tiles are touched. Put the triangle in the bins for the + * tiles which we overlap. + */ static void do_triangle_ccw(struct setup_context *setup, const float (*v1)[4], @@ -237,15 +242,14 @@ do_triangle_ccw(struct setup_context *setup, const float (*v3)[4], boolean frontfacing ) { - + /* x/y positions in fixed point */ + const int x1 = subpixel_snap(v1[0][0]); + const int x2 = subpixel_snap(v2[0][0]); + const int x3 = subpixel_snap(v3[0][0]); const int y1 = subpixel_snap(v1[0][1]); const int y2 = subpixel_snap(v2[0][1]); const int y3 = subpixel_snap(v3[0][1]); - const int x1 = subpixel_snap(v1[0][0]); - const int x2 = subpixel_snap(v2[0][0]); - const int x3 = subpixel_snap(v3[0][0]); - struct lp_rast_triangle *tri = get_data( &setup->data, sizeof *tri ); float area; int minx, maxx, miny, maxy; @@ -270,7 +274,7 @@ do_triangle_ccw(struct setup_context *setup, return; } - // Bounding rectangle + /* Bounding rectangle (in pixels) */ tri->minx = (MIN3(x1, x2, x3) + 0xf) >> FIXED_ORDER; tri->maxx = (MAX3(x1, x2, x3) + 0xf) >> FIXED_ORDER; tri->miny = (MIN3(y1, y2, y3) + 0xf) >> FIXED_ORDER; @@ -372,13 +376,14 @@ do_triangle_ccw(struct setup_context *setup, } } + /* Convert to tile coordinates: + */ minx = tri->minx / TILE_SIZE; miny = tri->miny / TILE_SIZE; maxx = tri->maxx / TILE_SIZE; maxy = tri->maxy / TILE_SIZE; - - /* Convert to tile coordinates: + /* Determine which tile(s) intersect the triangle's bounding box */ if (miny == maxy && minx == maxx) { @@ -442,8 +447,9 @@ do_triangle_ccw(struct setup_context *setup, cx3 + ei3 > 0) { in = 1; - /* shade whole tile */ - bin_command( &setup->tile[x][y], lp_rast_shade_tile, + /* triangle covers the whole tile- shade whole tile */ + bin_command( &setup->tile[x][y], + lp_rast_shade_tile, lp_rast_arg_inputs(&tri->inputs) ); } else |