gtk2/gsk/gskvulkanblendmodepipeline.c
Matthias Clasen d61f6ff393 vulkan: Implement blend modes
This is another example for a 2-texture shader.
So far, only separable blend modes are implemented.
The implementation is not optimized, with an
if-else cascade in the shader.
2017-09-23 01:59:50 -04:00

147 lines
5.3 KiB
C

#include "config.h"
#include "gskvulkanblendmodepipelineprivate.h"
struct _GskVulkanBlendModePipeline
{
GObject parent_instance;
};
typedef struct _GskVulkanBlendModeInstance GskVulkanBlendModeInstance;
struct _GskVulkanBlendModeInstance
{
float rect[4];
float start_tex_rect[4];
float end_tex_rect[4];
guint32 blend_mode;
};
G_DEFINE_TYPE (GskVulkanBlendModePipeline, gsk_vulkan_blend_mode_pipeline, GSK_TYPE_VULKAN_PIPELINE)
static const VkPipelineVertexInputStateCreateInfo *
gsk_vulkan_blend_mode_pipeline_get_input_state_create_info (GskVulkanPipeline *self)
{
static const VkVertexInputBindingDescription vertexBindingDescriptions[] = {
{
.binding = 0,
.stride = sizeof (GskVulkanBlendModeInstance),
.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_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanBlendModeInstance, start_tex_rect),
},
{
.location = 2,
.binding = 0,
.format = VK_FORMAT_R32G32B32A32_SFLOAT,
.offset = G_STRUCT_OFFSET (GskVulkanBlendModeInstance, end_tex_rect),
},
{
.location = 3,
.binding = 0,
.format = VK_FORMAT_R32_UINT,
.offset = G_STRUCT_OFFSET (GskVulkanBlendModeInstance, blend_mode),
}
};
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_blend_mode_pipeline_finalize (GObject *gobject)
{
//GskVulkanBlendModePipeline *self = GSK_VULKAN_BLUR_PIPELINE (gobject);
G_OBJECT_CLASS (gsk_vulkan_blend_mode_pipeline_parent_class)->finalize (gobject);
}
static void
gsk_vulkan_blend_mode_pipeline_class_init (GskVulkanBlendModePipelineClass *klass)
{
GskVulkanPipelineClass *pipeline_class = GSK_VULKAN_PIPELINE_CLASS (klass);
G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_blend_mode_pipeline_finalize;
pipeline_class->get_input_state_create_info = gsk_vulkan_blend_mode_pipeline_get_input_state_create_info;
}
static void
gsk_vulkan_blend_mode_pipeline_init (GskVulkanBlendModePipeline *self)
{
}
GskVulkanPipeline *
gsk_vulkan_blend_mode_pipeline_new (GdkVulkanContext *context,
VkPipelineLayout layout,
const char *shader_name,
VkRenderPass render_pass)
{
return gsk_vulkan_pipeline_new (GSK_TYPE_VULKAN_BLEND_MODE_PIPELINE, context, layout, shader_name, render_pass);
}
gsize
gsk_vulkan_blend_mode_pipeline_count_vertex_data (GskVulkanBlendModePipeline *pipeline)
{
return sizeof (GskVulkanBlendModeInstance);
}
void
gsk_vulkan_blend_mode_pipeline_collect_vertex_data (GskVulkanBlendModePipeline *pipeline,
guchar *data,
const graphene_rect_t *bounds,
const graphene_rect_t *start_bounds,
const graphene_rect_t *end_bounds,
GskBlendMode blend_mode)
{
GskVulkanBlendModeInstance *instance = (GskVulkanBlendModeInstance *) data;
instance->rect[0] = bounds->origin.x;
instance->rect[1] = bounds->origin.y;
instance->rect[2] = bounds->size.width;
instance->rect[3] = bounds->size.height;
instance->start_tex_rect[0] = (bounds->origin.x - start_bounds->origin.x)/start_bounds->size.width;
instance->start_tex_rect[1] = (bounds->origin.y - start_bounds->origin.y)/start_bounds->size.height;
instance->start_tex_rect[2] = (bounds->size.width + bounds->origin.x - start_bounds->origin.x)/start_bounds->size.width;
instance->start_tex_rect[3] = (bounds->size.height + bounds->origin.y - start_bounds->origin.y)/start_bounds->size.height;
instance->end_tex_rect[0] = (bounds->origin.x - end_bounds->origin.x)/end_bounds->size.width;
instance->end_tex_rect[1] = (bounds->origin.y - end_bounds->origin.y)/end_bounds->size.height;
instance->end_tex_rect[2] = (bounds->size.width + bounds->origin.x - end_bounds->origin.x)/end_bounds->size.width;
instance->end_tex_rect[3] = (bounds->size.height + bounds->origin.y - end_bounds->origin.y)/end_bounds->size.height;
instance->blend_mode = blend_mode;
}
gsize
gsk_vulkan_blend_mode_pipeline_draw (GskVulkanBlendModePipeline *pipeline,
VkCommandBuffer command_buffer,
gsize offset,
gsize n_commands)
{
vkCmdDraw (command_buffer,
6, n_commands,
0, offset);
return n_commands;
}