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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-12-30 12:32:45 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-12-30 12:47:02 +0000 |
| commit | d3848521c497dbcd3d9ae0fab34fa70c72752e60 (patch) | |
| tree | 29a87a808645a17a47c493629259d1232d8b0d10 /src | |
| parent | 127dd466695dcb05e6178e4ed2471dba1b229d17 (diff) | |
| download | cairo-d3848521c497dbcd3d9ae0fab34fa70c72752e60.tar.gz | |
gl: Provide a fast emitter for solid glyphs
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cairo-gl-composite.c | 62 |
1 files changed, 49 insertions, 13 deletions
diff --git a/src/cairo-gl-composite.c b/src/cairo-gl-composite.c index 90feb6a8b..61dc7456f 100644 --- a/src/cairo-gl-composite.c +++ b/src/cairo-gl-composite.c @@ -936,10 +936,8 @@ _cairo_gl_context_choose_emit_span (cairo_gl_context_t *ctx) static inline void _cairo_gl_composite_emit_glyph_vertex (cairo_gl_context_t *ctx, - GLfloat x, - GLfloat y, - GLfloat glyph_x, - GLfloat glyph_y) + GLfloat x, GLfloat y, + GLfloat glyph_x, GLfloat glyph_y) { GLfloat *vb = (GLfloat *) (void *) &ctx->vb[ctx->vb_offset]; @@ -956,14 +954,10 @@ _cairo_gl_composite_emit_glyph_vertex (cairo_gl_context_t *ctx, static void _cairo_gl_composite_emit_glyph (cairo_gl_context_t *ctx, - GLfloat x1, - GLfloat y1, - GLfloat x2, - GLfloat y2, - GLfloat glyph_x1, - GLfloat glyph_y1, - GLfloat glyph_x2, - GLfloat glyph_y2) + GLfloat x1, GLfloat y1, + GLfloat x2, GLfloat y2, + GLfloat glyph_x1, GLfloat glyph_y1, + GLfloat glyph_x2, GLfloat glyph_y2) { _cairo_gl_composite_prepare_buffer (ctx, 6, CAIRO_GL_PRIMITIVE_TYPE_TRIANGLES); @@ -977,10 +971,52 @@ _cairo_gl_composite_emit_glyph (cairo_gl_context_t *ctx, _cairo_gl_composite_emit_glyph_vertex (ctx, x1, y2, glyph_x1, glyph_y2); } +static void +_cairo_gl_composite_emit_solid_glyph (cairo_gl_context_t *ctx, + GLfloat x1, GLfloat y1, + GLfloat x2, GLfloat y2, + GLfloat glyph_x1, GLfloat glyph_y1, + GLfloat glyph_x2, GLfloat glyph_y2) +{ + GLfloat *v; + + _cairo_gl_composite_prepare_buffer (ctx, 6, + CAIRO_GL_PRIMITIVE_TYPE_TRIANGLES); + + v = (GLfloat *) (void *) &ctx->vb[ctx->vb_offset]; + + v[20] = v[ 8] = v[0] = x1; + v[13] = v[ 5] = v[1] = y1; + v[22] = v[10] = v[2] = glyph_x1; + v[15] = v[ 7] = v[3] = glyph_y1; + + v[16] = v[12] = v[4] = x2; + v[18] = v[14] = v[6] = glyph_x2; + + v[21] = v[17] = v[ 9] = y2; + v[23] = v[19] = v[11] = glyph_y2; + + ctx->vb_offset += 4 * 6 * sizeof (GLfloat); +} + cairo_gl_emit_glyph_t _cairo_gl_context_choose_emit_glyph (cairo_gl_context_t *ctx) { - return _cairo_gl_composite_emit_glyph; + switch (ctx->operands[CAIRO_GL_TEX_SOURCE].type) { + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + case CAIRO_GL_OPERAND_CONSTANT: + return _cairo_gl_composite_emit_solid_glyph; + + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + case CAIRO_GL_OPERAND_TEXTURE: + return _cairo_gl_composite_emit_glyph; + } } void |