diff options
| author | Francisco Jerez <currojerez@riseup.net> | 2010-11-02 02:49:48 +0100 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2010-11-04 13:58:54 -0600 |
| commit | 7831994868d039da726cc0c1a86b1f94137ad412 (patch) | |
| tree | e00205a5e23749dc34ddb646b7b13c259c7be439 /src/mesa/drivers/common/meta.c | |
| parent | d8463623893b189dae5ab7288395ffb54849c572 (diff) | |
meta: Fix incorrect rendering of the bitmap alpha component.
Signed-off-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'src/mesa/drivers/common/meta.c')
| -rw-r--r-- | src/mesa/drivers/common/meta.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index b7a092e64f..6433c89d81 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -1997,6 +1997,7 @@ _mesa_meta_Bitmap(struct gl_context *ctx, struct temp_texture *tex = get_bitmap_temp_texture(ctx); const GLenum texIntFormat = GL_ALPHA; const struct gl_pixelstore_attrib unpackSave = *unpack; + GLubyte fg, bg; struct vertex { GLfloat x, y, z, s, t, r, g, b, a; }; @@ -2098,21 +2099,26 @@ _mesa_meta_Bitmap(struct gl_context *ctx, _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); } + /* choose different foreground/background alpha values */ + CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]); + bg = (fg > 127 ? 0 : 255); + bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1); if (!bitmap1) { _mesa_meta_end(ctx); return; } - bitmap8 = (GLubyte *) calloc(1, width * height); + bitmap8 = (GLubyte *) malloc(width * height); if (bitmap8) { + memset(bitmap8, bg, width * height); _mesa_expand_bitmap(width, height, &unpackSave, bitmap1, - bitmap8, width, 0xff); + bitmap8, width, fg); _mesa_set_enable(ctx, tex->Target, GL_TRUE); _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE); - _mesa_AlphaFunc(GL_GREATER, 0.0); + _mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg)); setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height, GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8); |