Kenneth Graunke <kenn...@whitecape.org> writes: > This will be used for emulating GL_KHR_advanced_blend_equation features > in shader code. We'll pass in the blending mode that's in use, and use > that in (effectively) a switch statement in the shader. > > Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
Reviewed-by: Francisco Jerez <curroje...@riseup.net>
> ---
> src/mesa/program/prog_statevars.c | 53
> +++++++++++++++++++++++++++++++++++++++
> src/mesa/program/prog_statevars.h | 5 ++++
> 2 files changed, 58 insertions(+)
>
> diff --git a/src/mesa/program/prog_statevars.c
> b/src/mesa/program/prog_statevars.c
> index 8dddc0b..a63c2a5 100644
> --- a/src/mesa/program/prog_statevars.c
> +++ b/src/mesa/program/prog_statevars.c
> @@ -45,6 +45,44 @@
>
> #define ONE_DIV_SQRT_LN2 (1.201122408786449815)
>
> +static enum gl_blend_support_qualifier
> +advanced_blend_mode_from_gl_enum(GLenum mode)
> +{
> + switch (mode) {
> + case GL_MULTIPLY_KHR:
> + return BLEND_MULTIPLY;
> + case GL_SCREEN_KHR:
> + return BLEND_SCREEN;
> + case GL_OVERLAY_KHR:
> + return BLEND_OVERLAY;
> + case GL_DARKEN_KHR:
> + return BLEND_DARKEN;
> + case GL_LIGHTEN_KHR:
> + return BLEND_LIGHTEN;
> + case GL_COLORDODGE_KHR:
> + return BLEND_COLORDODGE;
> + case GL_COLORBURN_KHR:
> + return BLEND_COLORBURN;
> + case GL_HARDLIGHT_KHR:
> + return BLEND_HARDLIGHT;
> + case GL_SOFTLIGHT_KHR:
> + return BLEND_SOFTLIGHT;
> + case GL_DIFFERENCE_KHR:
> + return BLEND_DIFFERENCE;
> + case GL_EXCLUSION_KHR:
> + return BLEND_EXCLUSION;
> + case GL_HSL_HUE_KHR:
> + return BLEND_HSL_HUE;
> + case GL_HSL_SATURATION_KHR:
> + return BLEND_HSL_SATURATION;
> + case GL_HSL_COLOR_KHR:
> + return BLEND_HSL_COLOR;
> + case GL_HSL_LUMINOSITY_KHR:
> + return BLEND_HSL_LUMINOSITY;
> + default:
> + return 0;
> + }
> +}
>
> /**
> * Use the list of tokens in the state[] array to find global GL state
> @@ -609,6 +647,15 @@ _mesa_fetch_state(struct gl_context *ctx, const
> gl_state_index state[],
> val[0].i = ctx->TessCtrlProgram.patch_vertices;
> return;
>
> + case STATE_ADVANCED_BLENDING_MODE:
> + if (ctx->Color.BlendEnabled & 1) {
> + GLenum eqn = ctx->Color.Blend[0].EquationRGB;
> + val[0].i = advanced_blend_mode_from_gl_enum(eqn);
> + } else {
> + val[0].i = 0;
> + }
> + return;
> +
> /* XXX: make sure new tokens added here are also handled in the
> * _mesa_program_state_flags() switch, below.
> */
> @@ -719,6 +766,9 @@ _mesa_program_state_flags(const gl_state_index
> state[STATE_LENGTH])
> case STATE_FB_WPOS_Y_TRANSFORM:
> return _NEW_BUFFERS;
>
> + case STATE_ADVANCED_BLENDING_MODE:
> + return _NEW_COLOR;
> +
> default:
> /* unknown state indexes are silently ignored and
> * no flag set, since it is handled by the driver.
> @@ -925,6 +975,9 @@ append_token(char *dst, gl_state_index k)
> case STATE_FB_WPOS_Y_TRANSFORM:
> append(dst, "FbWposYTransform");
> break;
> + case STATE_ADVANCED_BLENDING_MODE:
> + append(dst, "AdvancedBlendingMode");
> + break;
> default:
> /* probably STATE_INTERNAL_DRIVER+i (driver private state) */
> append(dst, "driverState");
> diff --git a/src/mesa/program/prog_statevars.h
> b/src/mesa/program/prog_statevars.h
> index e716d90..7fecb37 100644
> --- a/src/mesa/program/prog_statevars.h
> +++ b/src/mesa/program/prog_statevars.h
> @@ -130,6 +130,11 @@ typedef enum gl_state_index_ {
> STATE_FB_WPOS_Y_TRANSFORM, /**< (1, 0, -1, height) if a FBO is bound,
> (-1, height, 1, 0) otherwise */
> STATE_TCS_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TCS (integer) */
> STATE_TES_PATCH_VERTICES_IN, /**< gl_PatchVerticesIn for TES (integer) */
> + /**
> + * A single enum gl_blend_support_qualifier value representing the
> + * currently active advanced blending equation, or zero if disabled.
> + */
> + STATE_ADVANCED_BLENDING_MODE,
> STATE_INTERNAL_DRIVER /* first available state index for drivers
> (must be last) */
> } gl_state_index;
>
> --
> 2.9.0
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/mesa-dev
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