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vulkan: Handle linear gradients

Browse Source 
Note: We interpolate premultiplied colors as per the CSS spec. This i
different from Cairo, which interpolates unpremultiplied.

So in testcases with translucent gradients, it's actually Cairo that is
wrong.
This commit is contained in:
Benjamin Otte 2016-12-26 17:11:13 +01:00
parent c0c44c7b9c
commit af917c4ade
20 changed files with 771 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
gsk/Makefile.am
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@ -29,6 +29,7 @@ gsk_private_vulkan_source_h = \
gskvulkanclipprivate.h \
gskvulkancolorpipelineprivate.h \
gskvulkancommandpoolprivate.h \
gskvulkanlineargradientpipelineprivate.h \
gskvulkanimageprivate.h \
gskvulkanmemoryprivate.h \
gskvulkanpipelineprivate.h \
@ -43,6 +44,7 @@ gsk_private_vulkan_source_c = \
gskvulkanclip.c \
gskvulkancolorpipeline.c \
gskvulkancommandpool.c \
gskvulkanlineargradientpipeline.c \
gskvulkanimage.c \
gskvulkanmemory.c \
gskvulkanpipeline.c \

32
gsk/gskrendernodeimpl.c
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@ -383,6 +383,38 @@ gsk_repeating_linear_gradient_node_new (const graphene_rect_t *bounds,
return &self->render_node;
}
const graphene_point_t *
gsk_linear_gradient_node_peek_start (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
return &self->start;
}
const graphene_point_t *
gsk_linear_gradient_node_peek_end (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
return &self->end;
}
const gsize
gsk_linear_gradient_node_get_n_color_stops (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
return self->n_stops;
}
const GskColorStop *
gsk_linear_gradient_node_peek_color_stops (GskRenderNode *node)
{
GskLinearGradientNode *self = (GskLinearGradientNode *) node;
return self->stops;
}
/*** GSK_BORDER_NODE ***/
typedef struct _GskBorderNode GskBorderNode;

5
gsk/gskrendernodeprivate.h
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@ -46,6 +46,11 @@ GskRenderNode * gsk_render_node_deserialize_node (GskRenderNodeType type, GVaria
double gsk_opacity_node_get_opacity (GskRenderNode *node);
const graphene_point_t * gsk_linear_gradient_node_peek_start (GskRenderNode *node);
const graphene_point_t * gsk_linear_gradient_node_peek_end (GskRenderNode *node);
const gsize gsk_linear_gradient_node_get_n_color_stops (GskRenderNode *node);
const GskColorStop * gsk_linear_gradient_node_peek_color_stops (GskRenderNode *node);
const GskRoundedRect * gsk_border_node_peek_outline (GskRenderNode *node);
float gsk_border_node_get_width (GskRenderNode *node, guint i);
const GdkRGBA * gsk_border_node_peek_color (GskRenderNode *node, guint i);

224
gsk/gskvulkanlineargradientpipeline.c Normal file
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@ -0,0 +1,224 @@
#include "config.h"
#include "gskvulkanlineargradientpipelineprivate.h"
struct _GskVulkanLinearGradientPipeline
{
GObject parent_instance;
};
typedef struct _GskVulkanLinearGradientInstance GskVulkanLinearGradientInstance;
struct _GskVulkanLinearGradientInstance
{
float rect[4];
float start[2];
float end[2];
gint32 repeating;
gint32 stop_count;
float offsets[GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS];
float colors[GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS][4];
};
G_DEFINE_TYPE (GskVulkanLinearGradientPipeline, gsk_vulkan_linear_gradient_pipeline, GSK_TYPE_VULKAN_PIPELINE)
static const VkPipelineVertexInputStateCreateInfo *
gsk_vulkan_linear_gradient_pipeline_get_input_state_create_info (GskVulkanPipeline *self)
{
static const VkVertexInputBindingDescription vertexBindingDescriptions[] = {
{
.binding = 0,
.stride = sizeof (GskVulkanLinearGradientInstance),
.inputRate = VK_VERTEX_INPUT_RATE_INSTANCE
}
};
static const VkVertexInputAttributeDescription vertexInputAttributeDescription[] = {
{
.location = 0,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = 0,
},
{
.location = 1,
.binding = 0,
.format = VK_FORMAT_R32G32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, start),
},
{
.location = 2,
.binding = 0,
.format = VK_FORMAT_R32G32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, end),
},
{
.location = 3,
.binding = 0,
.format = VK_FORMAT_R32_SINT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, repeating),
},
{
.location = 4,
.binding = 0,
.format = VK_FORMAT_R32_SINT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, stop_count),
},
{
.location = 5,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, offsets),
},
{
.location = 6,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, offsets) + sizeof (float) * 4,
},
{
.location = 7,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[0]),
},
{
.location = 8,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[1]),
},
{
.location = 9,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[2]),
},
{
.location = 10,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[3]),
},
{
.location = 11,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[4]),
},
{
.location = 12,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[5]),
},
{
.location = 13,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[6]),
},
{
.location = 14,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanLinearGradientInstance, colors[7]),
}
};
static const VkPipelineVertexInputStateCreateInfo info = {
.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
.vertexBindingDescriptionCount = G_N_ELEMENTS (vertexBindingDescriptions),
.pVertexBindingDescriptions = vertexBindingDescriptions,
.vertexAttributeDescriptionCount = G_N_ELEMENTS (vertexInputAttributeDescription),
.pVertexAttributeDescriptions = vertexInputAttributeDescription
};
return &info;
}
static void
gsk_vulkan_linear_gradient_pipeline_finalize (GObject *gobject)
{
//GskVulkanLinearGradientPipeline *self = GSK_VULKAN_LINEAR_GRADIENT_PIPELINE (gobject);
G_OBJECT_CLASS (gsk_vulkan_linear_gradient_pipeline_parent_class)->finalize (gobject);
}
static void
gsk_vulkan_linear_gradient_pipeline_class_init (GskVulkanLinearGradientPipelineClass *klass)
{
GskVulkanPipelineClass *pipeline_class = GSK_VULKAN_PIPELINE_CLASS (klass);
G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_linear_gradient_pipeline_finalize;
pipeline_class->get_input_state_create_info = gsk_vulkan_linear_gradient_pipeline_get_input_state_create_info;
}
static void
gsk_vulkan_linear_gradient_pipeline_init (GskVulkanLinearGradientPipeline *self)
{
}
GskVulkanPipeline *
gsk_vulkan_linear_gradient_pipeline_new (GskVulkanPipelineLayout *layout,
const char *shader_name,
VkRenderPass render_pass)
{
return gsk_vulkan_pipeline_new (GSK_TYPE_VULKAN_LINEAR_GRADIENT_PIPELINE, layout, shader_name, render_pass);
}
gsize
gsk_vulkan_linear_gradient_pipeline_count_vertex_data (GskVulkanLinearGradientPipeline *pipeline)
{
return sizeof (GskVulkanLinearGradientInstance);
}
void
gsk_vulkan_linear_gradient_pipeline_collect_vertex_data (GskVulkanLinearGradientPipeline *pipeline,
guchar *data,
const graphene_rect_t *rect,
const graphene_point_t *start,
const graphene_point_t *end,
gboolean repeating,
gsize n_stops,
const GskColorStop *stops)
{
GskVulkanLinearGradientInstance *instance = (GskVulkanLinearGradientInstance *) data;
gsize i;
if (n_stops > GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS)
{
g_warning ("Only %u color stops supported.", GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS);
n_stops = GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS;
}
instance->rect[0] = rect->origin.x;
instance->rect[1] = rect->origin.y;
instance->rect[2] = rect->size.width;
instance->rect[3] = rect->size.height;
instance->start[0] = start->x;
instance->start[1] = start->y;
instance->end[0] = end->x;
instance->end[1] = end->y;
instance->repeating = repeating;
instance->stop_count = n_stops;
for (i = 0; i < n_stops; i++)
{
instance->offsets[i] = stops[i].offset;
instance->colors[i][0] = stops[i].color.red;
instance->colors[i][1] = stops[i].color.green;
instance->colors[i][2] = stops[i].color.blue;
instance->colors[i][3] = stops[i].color.alpha;
}
}
gsize
gsk_vulkan_linear_gradient_pipeline_draw (GskVulkanLinearGradientPipeline *pipeline,
VkCommandBuffer command_buffer,
gsize offset,
gsize n_commands)
{
vkCmdDraw (command_buffer,
6, n_commands,
0, offset);
return n_commands;
}

41
gsk/gskvulkanlineargradientpipelineprivate.h Normal file
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@ -0,0 +1,41 @@
#ifndef __GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_PRIVATE_H__
#define __GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_PRIVATE_H__
#include <graphene.h>
#include "gskvulkanpipelineprivate.h"
#include "gskrendernode.h"
G_BEGIN_DECLS
#define GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS 8
typedef struct _GskVulkanLinearGradientPipelineLayout GskVulkanLinearGradientPipelineLayout;
#define GSK_TYPE_VULKAN_LINEAR_GRADIENT_PIPELINE (gsk_vulkan_linear_gradient_pipeline_get_type ())
G_DECLARE_FINAL_TYPE (GskVulkanLinearGradientPipeline, gsk_vulkan_linear_gradient_pipeline, GSK, VULKAN_LINEAR_GRADIENT_PIPELINE, GskVulkanPipeline)
GskVulkanPipeline * gsk_vulkan_linear_gradient_pipeline_new (GskVulkanPipelineLayout * layout,
const char *shader_name,
VkRenderPass render_pass);
gsize gsk_vulkan_linear_gradient_pipeline_count_vertex_data
(GskVulkanLinearGradientPipeline*pipeline);
void gsk_vulkan_linear_gradient_pipeline_collect_vertex_data
(GskVulkanLinearGradientPipeline*pipeline,
guchar *data,
const graphene_rect_t *rect,
const graphene_point_t *start,
const graphene_point_t *end,
gboolean repeating,
gsize n_stops,
const GskColorStop *stops);
gsize gsk_vulkan_linear_gradient_pipeline_draw (GskVulkanLinearGradientPipeline*pipeline,
VkCommandBuffer command_buffer,
gsize offset,
gsize n_commands);
G_END_DECLS
#endif /* __GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_PRIVATE_H__ */

6
gsk/gskvulkanrender.c
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@ -10,6 +10,7 @@
#include "gskvulkanblendpipelineprivate.h"
#include "gskvulkancolorpipelineprivate.h"
#include "gskvulkanlineargradientpipelineprivate.h"
#define ORTHO_NEAR_PLANE -10000
#define ORTHO_FAR_PLANE 10000
@ -316,7 +317,10 @@ gsk_vulkan_render_get_pipeline (GskVulkanRender *self,
{ "blit", gsk_vulkan_blend_pipeline_new },
{ "color", gsk_vulkan_color_pipeline_new },
{ "color-clip", gsk_vulkan_color_pipeline_new },
{ "color-clip-rounded", gsk_vulkan_color_pipeline_new }
{ "color-clip-rounded", gsk_vulkan_color_pipeline_new },
{ "linear", gsk_vulkan_linear_gradient_pipeline_new },
{ "linear-clip", gsk_vulkan_linear_gradient_pipeline_new },
{ "linear-clip-rounded", gsk_vulkan_linear_gradient_pipeline_new }
};
g_return_val_if_fail (type < GSK_VULKAN_N_PIPELINES, NULL);

64
gsk/gskvulkanrenderpass.c
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@ -9,6 +9,7 @@
#include "gskvulkanblendpipelineprivate.h"
#include "gskvulkanclipprivate.h"
#include "gskvulkancolorpipelineprivate.h"
#include "gskvulkanlineargradientpipelineprivate.h"
#include "gskvulkanimageprivate.h"
#include "gskvulkanpushconstantsprivate.h"
#include "gskvulkanrendererprivate.h"
@ -25,6 +26,7 @@ typedef enum {
GSK_VULKAN_OP_SURFACE,
GSK_VULKAN_OP_TEXTURE,
GSK_VULKAN_OP_COLOR,
GSK_VULKAN_OP_LINEAR_GRADIENT,
/* GskVulkanOpPushConstants */
GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS
} GskVulkanOpType;
@ -140,6 +142,25 @@ gsk_vulkan_render_pass_add_node (GskVulkanRenderPass *self,
g_array_append_val (self->render_ops, op);
return;
case GSK_LINEAR_GRADIENT_NODE:
case GSK_REPEATING_LINEAR_GRADIENT_NODE:
if (gsk_linear_gradient_node_get_n_color_stops (node) > GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS)
FALLBACK ("Linear gradient with %zu color stops, hardcoded limit is %u\n",
gsk_linear_gradient_node_get_n_color_stops (node),
GSK_VULKAN_LINEAR_GRADIENT_PIPELINE_MAX_COLOR_STOPS);
if (gsk_vulkan_clip_contains_rect (&constants->clip, &node->bounds))
pipeline_type = GSK_VULKAN_PIPELINE_LINEAR_GRADIENT;
else if (constants->clip.type == GSK_VULKAN_CLIP_RECT)
pipeline_type = GSK_VULKAN_PIPELINE_LINEAR_GRADIENT_CLIP;
else if (constants->clip.type == GSK_VULKAN_CLIP_ROUNDED_CIRCULAR)
pipeline_type = GSK_VULKAN_PIPELINE_LINEAR_GRADIENT_CLIP_ROUNDED;
else
FALLBACK ("Linear gradient nodes can't deal with clip type %u\n", constants->clip.type);
op.type = GSK_VULKAN_OP_LINEAR_GRADIENT;
op.render.pipeline = gsk_vulkan_render_get_pipeline (render, pipeline_type);
g_array_append_val (self->render_ops, op);
return;
case GSK_CONTAINER_NODE:
{
guint i;
@ -350,6 +371,7 @@ gsk_vulkan_render_pass_upload (GskVulkanRenderPass *self,
default:
g_assert_not_reached ();
case GSK_VULKAN_OP_COLOR:
case GSK_VULKAN_OP_LINEAR_GRADIENT:
case GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS:
break;
}
@ -384,6 +406,11 @@ gsk_vulkan_render_pass_count_vertex_data (GskVulkanRenderPass *self)
n_bytes += op->render.vertex_count;
break;
case GSK_VULKAN_OP_LINEAR_GRADIENT:
op->render.vertex_count = gsk_vulkan_linear_gradient_pipeline_count_vertex_data (GSK_VULKAN_LINEAR_GRADIENT_PIPELINE (op->render.pipeline));
n_bytes += op->render.vertex_count;
break;
default:
g_assert_not_reached ();
case GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS:
@ -436,6 +463,21 @@ gsk_vulkan_render_pass_collect_vertex_data (GskVulkanRenderPass *self,
}
break;
case GSK_VULKAN_OP_LINEAR_GRADIENT:
{
op->render.vertex_offset = offset + n_bytes;
gsk_vulkan_linear_gradient_pipeline_collect_vertex_data (GSK_VULKAN_LINEAR_GRADIENT_PIPELINE (op->render.pipeline),
data + n_bytes + offset,
&op->render.node->bounds,
gsk_linear_gradient_node_peek_start (op->render.node),
gsk_linear_gradient_node_peek_end (op->render.node),
gsk_render_node_get_node_type (op->render.node) == GSK_REPEATING_LINEAR_GRADIENT_NODE,
gsk_linear_gradient_node_get_n_color_stops (op->render.node),
gsk_linear_gradient_node_peek_color_stops (op->render.node));
n_bytes += op->render.vertex_count;
}
break;
default:
g_assert_not_reached ();
case GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS:
@ -472,6 +514,7 @@ gsk_vulkan_render_pass_reserve_descriptor_sets (GskVulkanRenderPass *self,
default:
g_assert_not_reached ();
case GSK_VULKAN_OP_COLOR:
case GSK_VULKAN_OP_LINEAR_GRADIENT:
case GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS:
break;
}
@ -563,6 +606,27 @@ gsk_vulkan_render_pass_draw (GskVulkanRenderPass *self,
current_draw_index, step);
break;
case GSK_VULKAN_OP_LINEAR_GRADIENT:
if (current_pipeline != op->render.pipeline)
{
current_pipeline = op->render.pipeline;
vkCmdBindPipeline (command_buffer,
VK_PIPELINE_BIND_POINT_GRAPHICS,
gsk_vulkan_pipeline_get_pipeline (current_pipeline));
vkCmdBindVertexBuffers (command_buffer,
0,
1,
(VkBuffer[1]) {
gsk_vulkan_buffer_get_buffer (vertex_buffer)
},
(VkDeviceSize[1]) { op->render.vertex_offset });
current_draw_index = 0;
}
current_draw_index += gsk_vulkan_linear_gradient_pipeline_draw (GSK_VULKAN_LINEAR_GRADIENT_PIPELINE (current_pipeline),
command_buffer,
current_draw_index, 1);
break;
case GSK_VULKAN_OP_PUSH_VERTEX_CONSTANTS:
gsk_vulkan_push_constants_push_vertex (&op->constants.constants,
command_buffer,

3
gsk/gskvulkanrenderprivate.h
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@ -14,6 +14,9 @@ typedef enum {
GSK_VULKAN_PIPELINE_COLOR,
GSK_VULKAN_PIPELINE_COLOR_CLIP,
GSK_VULKAN_PIPELINE_COLOR_CLIP_ROUNDED,
GSK_VULKAN_PIPELINE_LINEAR_GRADIENT,
GSK_VULKAN_PIPELINE_LINEAR_GRADIENT_CLIP,
GSK_VULKAN_PIPELINE_LINEAR_GRADIENT_CLIP_ROUNDED,
/* add more */
GSK_VULKAN_N_PIPELINES
} GskVulkanPipelineType;

78
gsk/resources/vulkan/linear-clip-rounded.frag.glsl Normal file
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@ -0,0 +1,78 @@
#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
struct RoundedRect {
vec4 bounds;
vec4 corners;
};
layout(location = 0) in vec2 inPos;
layout(location = 1) in float inGradientPos;
layout(location = 2) in flat int inRepeating;
layout(location = 3) in flat int inStopCount;
layout(location = 4) in flat vec4 inClipBounds;
layout(location = 5) in flat vec4 inClipWidths;
layout(location = 6) in flat ColorStop inStops[8];
layout(location = 0) out vec4 outColor;
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
float clip(vec2 pos, RoundedRect r) {
vec2 ref_tl = r.bounds.xy + vec2( r.corners.x, r.corners.x);
vec2 ref_tr = r.bounds.zy + vec2(-r.corners.y, r.corners.y);
vec2 ref_br = r.bounds.zw + vec2(-r.corners.z, -r.corners.z);
vec2 ref_bl = r.bounds.xw + vec2( r.corners.w, -r.corners.w);
float d_tl = distance(pos, ref_tl);
float d_tr = distance(pos, ref_tr);
float d_br = distance(pos, ref_br);
float d_bl = distance(pos, ref_bl);
float pixels_per_fragment = length(fwidth(pos.xy));
float nudge = 0.5 * pixels_per_fragment;
vec4 distances = vec4(d_tl, d_tr, d_br, d_bl) - r.corners + nudge;
bvec4 is_out = bvec4(pos.x < ref_tl.x && pos.y < ref_tl.y,
pos.x > ref_tr.x && pos.y < ref_tr.y,
pos.x > ref_br.x && pos.y > ref_br.y,
pos.x < ref_bl.x && pos.y > ref_bl.y);
float distance_from_border = dot(vec4(is_out),
max(vec4(0.0, 0.0, 0.0, 0.0), distances));
// Move the distance back into pixels.
distance_from_border /= pixels_per_fragment;
// Apply a more gradual fade out to transparent.
//distance_from_border -= 0.5;
return 1.0 - smoothstep(0.0, 1.0, distance_from_border);
}
void main()
{
RoundedRect r = RoundedRect(vec4(inClipBounds.xy, inClipBounds.xy + inClipBounds.zw), inClipWidths);
float pos;
if (inRepeating != 0)
pos = fract (inGradientPos);
else
pos = clamp (inGradientPos, 0, 1);
vec4 color = inStops[0].color;
int n = clamp (inStopCount, 2, 8);
for (int i = 1; i < n; i++)
{
if (inStops[i].offset > inStops[i-1].offset)
color = mix (color, inStops[i].color, clamp((pos - inStops[i-1].offset) / (inStops[i].offset - inStops[i-1].offset), 0, 1));
}
//outColor = vec4(pos, pos, pos, 1.0);
outColor = color * clip (inPos, r);
}

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gsk/resources/vulkan/linear-clip-rounded.frag.spv Normal file
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84
gsk/resources/vulkan/linear-clip-rounded.vert.glsl Normal file
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@ -0,0 +1,84 @@
#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
layout(location = 0) in vec4 inRect;
layout(location = 1) in vec2 inStart;
layout(location = 2) in vec2 inEnd;
layout(location = 3) in int inRepeating;
layout(location = 4) in int inStopCount;
layout(location = 5) in vec4 inOffsets0;
layout(location = 6) in vec4 inOffsets1;
layout(location = 7) in vec4 inColors0;
layout(location = 8) in vec4 inColors1;
layout(location = 9) in vec4 inColors2;
layout(location = 10) in vec4 inColors3;
layout(location = 11) in vec4 inColors4;
layout(location = 12) in vec4 inColors5;
layout(location = 13) in vec4 inColors6;
layout(location = 14) in vec4 inColors7;
layout(push_constant) uniform PushConstants {
mat4 mvp;
vec4 clip_bounds;
vec4 clip_widths;
vec4 clip_heights;
} push;
layout(location = 0) out vec2 outPos;
layout(location = 1) out float outGradientPos;
layout(location = 2) out flat int outRepeating;
layout(location = 3) out flat int outStopCount;
layout(location = 4) out flat vec4 outClipBounds;
layout(location = 5) out flat vec4 outClipWidths;
layout(location = 6) out flat ColorStop outStops[8];
out gl_PerVertex {
vec4 gl_Position;
};
vec2 offsets[6] = { vec2(0.0, 0.0),
vec2(1.0, 0.0),
vec2(0.0, 1.0),
vec2(0.0, 1.0),
vec2(1.0, 0.0),
vec2(1.0, 1.0) };
float
get_gradient_pos (vec2 pos)
{
pos = pos - inStart;
vec2 grad = inEnd - inStart;
return dot (pos, grad) / dot (grad, grad);
}
void main() {
vec2 pos = inRect.xy + inRect.zw * offsets[gl_VertexIndex];
gl_Position = push.mvp * vec4 (pos, 0.0, 1.0);
outPos = pos;
outGradientPos = get_gradient_pos (pos);
outClipBounds = push.clip_bounds;
outClipWidths = push.clip_widths;
outRepeating = inRepeating;
outStopCount = inStopCount;
outStops[0].offset = inOffsets0[0];
outStops[0].color = inColors0 * vec4(inColors0.aaa, 1.0);
outStops[1].offset = inOffsets0[1];
outStops[1].color = inColors1 * vec4(inColors1.aaa, 1.0);
outStops[2].offset = inOffsets0[2];
outStops[2].color = inColors2 * vec4(inColors2.aaa, 1.0);
outStops[3].offset = inOffsets0[3];
outStops[3].color = inColors3 * vec4(inColors3.aaa, 1.0);
outStops[4].offset = inOffsets1[0];
outStops[4].color = inColors4 * vec4(inColors4.aaa, 1.0);
outStops[5].offset = inOffsets1[1];
outStops[5].color = inColors5 * vec4(inColors5.aaa, 1.0);
outStops[6].offset = inOffsets1[2];
outStops[6].color = inColors6 * vec4(inColors6.aaa, 1.0);
outStops[7].offset = inOffsets1[3];
outStops[7].color = inColors7 * vec4(inColors7.aaa, 1.0);
}

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#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
layout(location = 0) in float inGradientPos;
layout(location = 1) in flat int inRepeating;
layout(location = 2) in flat int inStopCount;
layout(location = 3) in flat ColorStop inStops[8];
layout(location = 0) out vec4 outColor;
void main()
{
float pos;
if (inRepeating != 0)
pos = fract (inGradientPos);
else
pos = clamp (inGradientPos, 0, 1);
vec4 color = inStops[0].color;
int n = clamp (inStopCount, 2, 8);
for (int i = 1; i < n; i++)
{
if (inStops[i].offset > inStops[i-1].offset)
color = mix (color, inStops[i].color, clamp((pos - inStops[i-1].offset) / (inStops[i].offset - inStops[i-1].offset), 0, 1));
}
//outColor = vec4(pos, pos, pos, 1.0);
outColor = color;
}

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#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
layout(location = 0) in vec4 inRect;
layout(location = 1) in vec2 inStart;
layout(location = 2) in vec2 inEnd;
layout(location = 3) in int inRepeating;
layout(location = 4) in int inStopCount;
layout(location = 5) in vec4 inOffsets0;
layout(location = 6) in vec4 inOffsets1;
layout(location = 7) in vec4 inColors0;
layout(location = 8) in vec4 inColors1;
layout(location = 9) in vec4 inColors2;
layout(location = 10) in vec4 inColors3;
layout(location = 11) in vec4 inColors4;
layout(location = 12) in vec4 inColors5;
layout(location = 13) in vec4 inColors6;
layout(location = 14) in vec4 inColors7;
layout(push_constant) uniform PushConstants {
mat4 mvp;
vec4 clip_bounds;
vec4 clip_widths;
vec4 clip_heights;
} push;
layout(location = 0) out float outGradientPos;
layout(location = 1) out flat int outRepeating;
layout(location = 2) out flat int outStopCount;
layout(location = 3) out flat ColorStop outStops[8];
out gl_PerVertex {
vec4 gl_Position;
};
vec2 offsets[6] = { vec2(0.0, 0.0),
vec2(1.0, 0.0),
vec2(0.0, 1.0),
vec2(0.0, 1.0),
vec2(1.0, 0.0),
vec2(1.0, 1.0) };
float
get_gradient_pos (vec2 pos)
{
pos = pos - inStart;
vec2 grad = inEnd - inStart;
return dot (pos, grad) / dot (grad, grad);
}
void main() {
vec2 pos = inRect.xy + inRect.zw * offsets[gl_VertexIndex];
gl_Position = push.mvp * vec4 (pos, 0.0, 1.0);
outGradientPos = get_gradient_pos (pos);
outRepeating = inRepeating;
outStopCount = inStopCount;
outStops[0].offset = inOffsets0[0];
outStops[0].color = inColors0 * vec4(inColors0.aaa, 1.0);
outStops[1].offset = inOffsets0[1];
outStops[1].color = inColors1 * vec4(inColors1.aaa, 1.0);
outStops[2].offset = inOffsets0[2];
outStops[2].color = inColors2 * vec4(inColors2.aaa, 1.0);
outStops[3].offset = inOffsets0[3];
outStops[3].color = inColors3 * vec4(inColors3.aaa, 1.0);
outStops[4].offset = inOffsets1[0];
outStops[4].color = inColors4 * vec4(inColors4.aaa, 1.0);
outStops[5].offset = inOffsets1[1];
outStops[5].color = inColors5 * vec4(inColors5.aaa, 1.0);
outStops[6].offset = inOffsets1[2];
outStops[6].color = inColors6 * vec4(inColors6.aaa, 1.0);
outStops[7].offset = inOffsets1[3];
outStops[7].color = inColors7 * vec4(inColors7.aaa, 1.0);
}

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#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
layout(location = 0) in float inGradientPos;
layout(location = 1) in flat int inRepeating;
layout(location = 2) in flat int inStopCount;
layout(location = 3) in flat ColorStop inStops[8];
layout(location = 0) out vec4 outColor;
void main()
{
float pos;
if (inRepeating != 0)
pos = fract (inGradientPos);
else
pos = clamp (inGradientPos, 0, 1);
vec4 color = inStops[0].color;
int n = clamp (inStopCount, 2, 8);
for (int i = 1; i < n; i++)
{
if (inStops[i].offset > inStops[i-1].offset)
color = mix (color, inStops[i].color, clamp((pos - inStops[i-1].offset) / (inStops[i].offset - inStops[i-1].offset), 0, 1));
}
//outColor = vec4(pos, pos, pos, 1.0);
outColor = color;
}

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#version 420 core
struct ColorStop {
float offset;
vec4 color;
};
layout(location = 0) in vec4 inRect;
layout(location = 1) in vec2 inStart;
layout(location = 2) in vec2 inEnd;
layout(location = 3) in int inRepeating;
layout(location = 4) in int inStopCount;
layout(location = 5) in vec4 inOffsets0;
layout(location = 6) in vec4 inOffsets1;
layout(location = 7) in vec4 inColors0;
layout(location = 8) in vec4 inColors1;
layout(location = 9) in vec4 inColors2;
layout(location = 10) in vec4 inColors3;
layout(location = 11) in vec4 inColors4;
layout(location = 12) in vec4 inColors5;
layout(location = 13) in vec4 inColors6;
layout(location = 14) in vec4 inColors7;
layout(push_constant) uniform PushConstants {
mat4 mvp;
vec4 clip_bounds;
vec4 clip_widths;
vec4 clip_heights;
} push;
layout(location = 0) out float outGradientPos;
layout(location = 1) out flat int outRepeating;
layout(location = 2) out flat int outStopCount;
layout(location = 3) out flat ColorStop outStops[8];
out gl_PerVertex {
vec4 gl_Position;
};
vec2 offsets[6] = { vec2(0.0, 0.0),
vec2(1.0, 0.0),
vec2(0.0, 1.0),
vec2(0.0, 1.0),
vec2(1.0, 0.0),
vec2(1.0, 1.0) };
vec4 intersect(vec4 a, vec4 b)
{
a = vec4(a.xy, a.xy + a.zw);
b = vec4(b.xy, b.xy + b.zw);
vec4 result = vec4(max(a.xy, b.xy), min(a.zw, b.zw));
if (any (greaterThanEqual (result.xy, result.zw)))
return vec4(0.0,0.0,0.0,0.0);
return vec4(result.xy, result.zw - result.xy);
}
float
get_gradient_pos (vec2 pos)
{
pos = pos - inStart;
vec2 grad = inEnd - inStart;
return dot (pos, grad) / dot (grad, grad);
}
void main() {
vec4 rect = intersect(inRect, push.clip_bounds);
vec2 pos = rect.xy + rect.zw * offsets[gl_VertexIndex];
gl_Position = push.mvp * vec4 (pos, 0.0, 1.0);
outGradientPos = get_gradient_pos (pos);
outRepeating = inRepeating;
outStopCount = inStopCount;
outStops[0].offset = inOffsets0[0];
outStops[0].color = inColors0 * vec4(inColors0.aaa, 1.0);
outStops[1].offset = inOffsets0[1];
outStops[1].color = inColors1 * vec4(inColors1.aaa, 1.0);
outStops[2].offset = inOffsets0[2];
outStops[2].color = inColors2 * vec4(inColors2.aaa, 1.0);
outStops[3].offset = inOffsets0[3];
outStops[3].color = inColors3 * vec4(inColors3.aaa, 1.0);
outStops[4].offset = inOffsets1[0];
outStops[4].color = inColors4 * vec4(inColors4.aaa, 1.0);
outStops[5].offset = inOffsets1[1];
outStops[5].color = inColors5 * vec4(inColors5.aaa, 1.0);
outStops[6].offset = inOffsets1[2];
outStops[6].color = inColors6 * vec4(inColors6.aaa, 1.0);
outStops[7].offset = inOffsets1[3];
outStops[7].color = inColors7 * vec4(inColors7.aaa, 1.0);
}

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