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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 12:54:26 +0000 |
| commit | c29ab389fb2b3b91c895f2df684b0e9af8225d12 (patch) | |
| tree | 038006d249dfa580cb0f2c10dab64ba1cacecccd /src | |
| parent | d3848521c497dbcd3d9ae0fab34fa70c72752e60 (diff) | |
| download | cairo-c29ab389fb2b3b91c895f2df684b0e9af8225d12.tar.gz | |
gl: Provide a fast emitter for solid spans
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cairo-gl-composite.c | 55 |
1 files changed, 50 insertions, 5 deletions
diff --git a/src/cairo-gl-composite.c b/src/cairo-gl-composite.c index 61dc7456f..39dec5468 100644 --- a/src/cairo-gl-composite.c +++ b/src/cairo-gl-composite.c @@ -910,10 +910,8 @@ _cairo_gl_context_emit_rect (cairo_gl_context_t *ctx, static void _cairo_gl_composite_emit_span (cairo_gl_context_t *ctx, - GLfloat x1, - GLfloat y1, - GLfloat x2, - GLfloat y2, + GLfloat x1, GLfloat y1, + GLfloat x2, GLfloat y2, uint8_t alpha) { _cairo_gl_composite_prepare_buffer (ctx, 6, @@ -928,10 +926,57 @@ _cairo_gl_composite_emit_span (cairo_gl_context_t *ctx, _cairo_gl_composite_emit_alpha_vertex (ctx, x1, y2, alpha); } +static void +_cairo_gl_composite_emit_solid_span (cairo_gl_context_t *ctx, + GLfloat x1, GLfloat y1, + GLfloat x2, GLfloat y2, + uint8_t alpha) +{ + GLfloat *v; + union fi { + float f; + GLbyte bytes[4]; + } fi; + + _cairo_gl_composite_prepare_buffer (ctx, 6, + CAIRO_GL_PRIMITIVE_TYPE_TRIANGLES); + v = (GLfloat *) (void *) &ctx->vb[ctx->vb_offset]; + + v[15] = v[ 6] = v[0] = x1; + v[10] = v[ 4] = v[1] = y1; + v[12] = v[ 9] = v[3] = x2; + v[16] = v[13] = v[7] = y2; + + fi.bytes[0] = 0; + fi.bytes[1] = 0; + fi.bytes[2] = 0; + fi.bytes[3] = alpha; + v[17] =v[14] = v[11] = v[8] = v[5] = v[2] = fi.f; + + ctx->vb_offset += 6*3 * sizeof(GLfloat); +} + cairo_gl_emit_span_t _cairo_gl_context_choose_emit_span (cairo_gl_context_t *ctx) { - return _cairo_gl_composite_emit_span; + if (ctx->operands[CAIRO_GL_TEX_MASK].type != CAIRO_GL_OPERAND_NONE) + return _cairo_gl_composite_emit_span; + + 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_span; + + 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_span; + } } static inline void |