diff options
Diffstat (limited to 'src/mesa/state_tracker')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_bitmap.c | 163 |
1 files changed, 67 insertions, 96 deletions
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c index e9d375dc58a..d73cd4abfa9 100644 --- a/src/mesa/state_tracker/st_cb_bitmap.c +++ b/src/mesa/state_tracker/st_cb_bitmap.c @@ -224,58 +224,37 @@ combined_bitmap_fragment_program(GLcontext *ctx) /** - * Create a texture which represents a bitmap image. + * Copy user-provide bitmap bits into texture buffer, expanding + * bits into texels. + * "On" bits will set texels to 0xff. + * "Off" bits will not modify texels. + * Note that the image is actually going to be upside down in + * the texture. We deal with that with texcoords. */ -static struct pipe_texture * -make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, - const struct gl_pixelstore_attrib *unpack, - const GLubyte *bitmap) +static void +unpack_bitmap(struct st_context *st, + GLint px, GLint py, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap, + ubyte *destBuffer, uint destStride) { - struct pipe_context *pipe = ctx->st->pipe; - struct pipe_screen *screen = pipe->screen; - struct pipe_surface *surface; - ubyte *dest; - struct pipe_texture *pt; - int row, col; - - /* PBO source... */ - bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); - if (!bitmap) { - return NULL; - } + GLint row, col; - /** - * Create texture to hold bitmap pattern. - */ - pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format, - 0, width, height, 1, 0); - if (!pt) { - _mesa_unmap_bitmap_pbo(ctx, unpack); - return NULL; - } - - surface = screen->get_tex_surface(screen, pt, 0, 0, 0); - - /* map texture surface */ - dest = pipe_surface_map(surface); - - /* Put image into texture surface. - * Note that the image is actually going to be upside down in - * the texture. We deal with that with texcoords. - */ +#define SET_PIXEL(COL, ROW) \ + destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0; for (row = 0; row < height; row++) { const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); - ubyte *destRow = dest + row * surface->pitch; if (unpack->LsbFirst) { /* Lsb first */ GLubyte mask = 1U << (unpack->SkipPixels & 0x7); for (col = 0; col < width; col++) { - /* set texel to 255 if bit is set */ - destRow[col] = (*src & mask) ? 0x0 : 0xff; + if (*src & mask) { + SET_PIXEL(col, row); + } if (mask == 128U) { src++; @@ -295,8 +274,9 @@ make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); for (col = 0; col < width; col++) { - /* set texel to 255 if bit is set */ - destRow[col] =(*src & mask) ? 0x0 : 0xff; + if (*src & mask) { + SET_PIXEL(col, row); + } if (mask == 1U) { src++; @@ -314,6 +294,50 @@ make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, } /* row */ +#undef SET_PIXEL +} + + +/** + * Create a texture which represents a bitmap image. + */ +static struct pipe_texture * +make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap) +{ + struct pipe_context *pipe = ctx->st->pipe; + struct pipe_screen *screen = pipe->screen; + struct pipe_surface *surface; + ubyte *dest; + struct pipe_texture *pt; + + /* PBO source... */ + bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); + if (!bitmap) { + return NULL; + } + + /** + * Create texture to hold bitmap pattern. + */ + pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format, + 0, width, height, 1, 0); + if (!pt) { + _mesa_unmap_bitmap_pbo(ctx, unpack); + return NULL; + } + + surface = screen->get_tex_surface(screen, pt, 0, 0, 0); + + /* map texture surface */ + dest = pipe_surface_map(surface); + + /* Put image into texture surface */ + memset(dest, 0xff, height * surface->pitch); + unpack_bitmap(ctx->st, 0, 0, width, height, unpack, bitmap, + dest, surface->pitch); + _mesa_unmap_bitmap_pbo(ctx, unpack); /* Release surface */ @@ -585,7 +609,6 @@ accum_bitmap(struct st_context *st, const GLubyte *bitmap ) { struct bitmap_cache *cache = st->bitmap.cache; - int row, col; int px = -999, py; if (width > BITMAP_CACHE_WIDTH || @@ -624,60 +647,8 @@ accum_bitmap(struct st_context *st, 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) \ - cache->buffer[(py + (ROW)) * BITMAP_CACHE_WIDTH + px + (COL)] = 0x0; - - for (row = 0; row < height; row++) { - const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, - bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); - - if (unpack->LsbFirst) { - /* Lsb first */ - GLubyte mask = 1U << (unpack->SkipPixels & 0x7); - for (col = 0; col < width; col++) { - - if (*src & mask) { - SET_PIXEL(col, row); - } - - if (mask == 128U) { - src++; - mask = 1U; - } - else { - mask = mask << 1; - } - } - - /* get ready for next row */ - if (mask != 1) - src++; - } - else { - /* Msb first */ - GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); - for (col = 0; col < width; col++) { - - if (*src & mask) { - SET_PIXEL(col, row); - } - - if (mask == 1U) { - src++; - mask = 128U; - } - else { - mask = mask >> 1; - } - } - - /* get ready for next row */ - if (mask != 128) - src++; - } - - } /* row */ + unpack_bitmap(st, px, py, width, height, unpack, bitmap, + cache->buffer, BITMAP_CACHE_WIDTH); return GL_TRUE; /* accumulated */ } |