}
/**
- * Emit instructions for the specified blend mode. Colors should be
- * premultiplied. Two temporary registers are required.
+ * Premultiply src and dst.
+ */
+static INLINE void
+blend_premultiply( struct ureg_program *ureg,
+ struct ureg_src src,
+ struct ureg_src src_channel_alpha,
+ struct ureg_src dst)
+{
+ /* premultiply src */
+ ureg_MUL(ureg,
+ ureg_writemask(ureg_dst(src), TGSI_WRITEMASK_XYZ),
+ src,
+ src_channel_alpha);
+ /* premultiply dst */
+ ureg_MUL(ureg,
+ ureg_writemask(ureg_dst(dst), TGSI_WRITEMASK_XYZ),
+ dst,
+ ureg_scalar(dst, TGSI_SWIZZLE_W));
+}
+
+/**
+ * Unpremultiply src.
+ */
+static INLINE void
+blend_unpremultiply( struct ureg_program *ureg,
+ struct ureg_src src,
+ struct ureg_src one,
+ struct ureg_dst temp[1])
+{
+ /* replace 0.0f by 1.0f before calculating reciprocal */
+ ureg_CMP(ureg,
+ temp[0],
+ ureg_negate(ureg_scalar(src, TGSI_SWIZZLE_W)),
+ ureg_scalar(src, TGSI_SWIZZLE_W),
+ one);
+ ureg_RCP(ureg, temp[0], ureg_src(temp[0]));
+
+ ureg_MUL(ureg,
+ ureg_writemask(ureg_dst(src), TGSI_WRITEMASK_XYZ),
+ src,
+ ureg_src(temp[0]));
+}
+
+/**
+ * Emit instructions for the specified blend mode. Colors will be
+ * unpremultiplied. Two temporary registers are required.
*
- * XXX callers do not pass premultiplied colors!
+ * The output is written back to src.
*/
static INLINE void
blend_generic(struct ureg_program *ureg,
VGBlendMode mode,
- struct ureg_dst out,
struct ureg_src src,
struct ureg_src src_channel_alpha,
struct ureg_src dst,
struct ureg_src one,
struct ureg_dst temp[2])
{
+ struct ureg_dst out;
+
+ blend_premultiply(ureg, src, src_channel_alpha, dst);
+
+ /* blend in-place */
+ out = ureg_dst(src);
+
switch (mode) {
case VG_BLEND_SRC:
ureg_MOV(ureg, out, src);
ureg_scalar(dst, TGSI_SWIZZLE_W), ureg_negate(src), src);
ureg_MAD(ureg, temp[1],
src_channel_alpha, ureg_negate(dst), dst);
- ureg_MAD(ureg, temp[1], src, dst, ureg_src(temp[1]));
+ ureg_MAD(ureg, temp[0], src, dst, ureg_src(temp[0]));
ureg_ADD(ureg, out, ureg_src(temp[0]), ureg_src(temp[1]));
/* alpha is src over */
ureg_ADD(ureg, ureg_writemask(out, TGSI_WRITEMASK_W),
assert(0);
break;
}
+
+ blend_unpremultiply(ureg, src, one, temp);
+}
+
+#define BLEND_GENERIC(mode) \
+ do { \
+ ureg_TEX(ureg, temp[2], TGSI_TEXTURE_2D, in[0], sampler[2]); \
+ blend_generic(ureg, (mode), ureg_src(temp[0]), ureg_src(temp[1]), \
+ ureg_src(temp[2]), \
+ ureg_scalar(constant[3], TGSI_SWIZZLE_Y), temp + 3); \
+ ureg_MOV(ureg, *out, ureg_src(temp[0])); \
+ } while (0)
+
+static INLINE void
+blend_src( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_SRC);
+}
+
+static INLINE void
+blend_src_over( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_SRC_OVER);
+}
+
+static INLINE void
+blend_dst_over( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_DST_OVER);
+}
+
+static INLINE void
+blend_src_in( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_SRC_IN);
+}
+
+static INLINE void
+blend_dst_in( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_DST_IN);
}
static INLINE void
struct ureg_dst *temp,
struct ureg_src *constant)
{
- ureg_TEX(ureg, temp[2], TGSI_TEXTURE_2D, in[0], sampler[2]);
- blend_generic(ureg, VG_BLEND_MULTIPLY, *out,
- ureg_src(temp[0]),
- ureg_src(temp[1]),
- ureg_src(temp[2]),
- ureg_scalar(constant[3], TGSI_SWIZZLE_Y),
- temp + 3);
+ BLEND_GENERIC(VG_BLEND_MULTIPLY);
}
static INLINE void
struct ureg_dst *temp,
struct ureg_src *constant)
{
- ureg_TEX(ureg, temp[2], TGSI_TEXTURE_2D, in[0], sampler[2]);
- blend_generic(ureg, VG_BLEND_SCREEN, *out,
- ureg_src(temp[0]),
- ureg_src(temp[1]),
- ureg_src(temp[2]),
- ureg_scalar(constant[3], TGSI_SWIZZLE_Y),
- temp + 3);
+ BLEND_GENERIC(VG_BLEND_SCREEN);
}
static INLINE void
struct ureg_dst *temp,
struct ureg_src *constant)
{
- ureg_TEX(ureg, temp[2], TGSI_TEXTURE_2D, in[0], sampler[2]);
- blend_generic(ureg, VG_BLEND_DARKEN, *out,
- ureg_src(temp[0]),
- ureg_src(temp[1]),
- ureg_src(temp[2]),
- ureg_scalar(constant[3], TGSI_SWIZZLE_Y),
- temp + 3);
+ BLEND_GENERIC(VG_BLEND_DARKEN);
}
static INLINE void
struct ureg_dst *temp,
struct ureg_src *constant)
{
- ureg_TEX(ureg, temp[2], TGSI_TEXTURE_2D, in[0], sampler[2]);
- blend_generic(ureg, VG_BLEND_LIGHTEN, *out,
- ureg_src(temp[0]),
- ureg_src(temp[1]),
- ureg_src(temp[2]),
- ureg_scalar(constant[3], TGSI_SWIZZLE_Y),
- temp + 3);
+ BLEND_GENERIC(VG_BLEND_LIGHTEN);
+}
+
+static INLINE void
+blend_additive( struct ureg_program *ureg,
+ struct ureg_dst *out,
+ struct ureg_src *in,
+ struct ureg_src *sampler,
+ struct ureg_dst *temp,
+ struct ureg_src *constant)
+{
+ BLEND_GENERIC(VG_BLEND_ADDITIVE);
}
static INLINE void
/* extra blend modes */
static const struct shader_asm_info shaders_blend_asm[] = {
- {VEGA_BLEND_MULTIPLY_SHADER, blend_multiply,
- VG_TRUE, 3, 1, 2, 1, 0, 5},
- {VEGA_BLEND_SCREEN_SHADER, blend_screen,
- VG_TRUE, 3, 1, 2, 1, 0, 5},
- {VEGA_BLEND_DARKEN_SHADER, blend_darken,
- VG_TRUE, 3, 1, 2, 1, 0, 5},
- {VEGA_BLEND_LIGHTEN_SHADER, blend_lighten,
- VG_TRUE, 3, 1, 2, 1, 0, 5},
+#define BLEND_ASM_INFO(id, func) { (id), (func), VG_TRUE, 3, 1, 2, 1, 0, 5 }
+ BLEND_ASM_INFO(VEGA_BLEND_SRC_SHADER, blend_src),
+ BLEND_ASM_INFO(VEGA_BLEND_SRC_OVER_SHADER, blend_src_over),
+ BLEND_ASM_INFO(VEGA_BLEND_DST_OVER_SHADER, blend_dst_over),
+ BLEND_ASM_INFO(VEGA_BLEND_SRC_IN_SHADER, blend_src_in),
+ BLEND_ASM_INFO(VEGA_BLEND_DST_IN_SHADER, blend_dst_in),
+ BLEND_ASM_INFO(VEGA_BLEND_MULTIPLY_SHADER, blend_multiply),
+ BLEND_ASM_INFO(VEGA_BLEND_SCREEN_SHADER, blend_screen),
+ BLEND_ASM_INFO(VEGA_BLEND_DARKEN_SHADER, blend_darken),
+ BLEND_ASM_INFO(VEGA_BLEND_LIGHTEN_SHADER, blend_lighten),
+ BLEND_ASM_INFO(VEGA_BLEND_ADDITIVE_SHADER, blend_additive)
+#undef BLEND_ASM_INFO
};
static const struct shader_asm_info shaders_mask_asm[] = {
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