mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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3aaea0ef40
In some cases, we were creating gigantic intermediate textures only to clip out a small section afterwards (e.g. in the listbox example in gtk4-demo). This is wasteful if we apply effects on the texture, such as blur or color-matrix. So, clip the dimensions of the intermediate texture with the current clip. To make this feasible, we move the texture coordinate computation out of the pipeline setup functions into the node_as_texture function where this clipping happens. One extra complication we encounter is that the node might get clipped away completely. Since Vulkan does not allow to create empty images, we bail out in this case and not draw anything. With these changes, the listbox example in gtk4-demo goes from 32M pixels of intermediate texture to 320000.
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
#include "config.h"
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#include "gskvulkantexturepipelineprivate.h"
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struct _GskVulkanTexturePipeline
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{
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GObject parent_instance;
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};
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typedef struct _GskVulkanTextureInstance GskVulkanTextureInstance;
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struct _GskVulkanTextureInstance
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{
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float rect[4];
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float tex_rect[4];
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};
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G_DEFINE_TYPE (GskVulkanTexturePipeline, gsk_vulkan_texture_pipeline, GSK_TYPE_VULKAN_PIPELINE)
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static const VkPipelineVertexInputStateCreateInfo *
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gsk_vulkan_texture_pipeline_get_input_state_create_info (GskVulkanPipeline *self)
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{
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static const VkVertexInputBindingDescription vertexBindingDescriptions[] = {
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{
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.binding = 0,
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.stride = sizeof (GskVulkanTextureInstance),
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.inputRate = VK_VERTEX_INPUT_RATE_INSTANCE
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}
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};
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static const VkVertexInputAttributeDescription vertexInputAttributeDescription[] = {
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{
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.location = 0,
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.binding = 0,
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.format = VK_FORMAT_R32G32B32A32_SFLOAT,
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.offset = G_STRUCT_OFFSET (GskVulkanTextureInstance, rect),
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},
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{
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.location = 1,
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.binding = 0,
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.format = VK_FORMAT_R32G32B32A32_SFLOAT,
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.offset = G_STRUCT_OFFSET (GskVulkanTextureInstance, tex_rect),
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}
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};
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static const VkPipelineVertexInputStateCreateInfo info = {
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.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
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.vertexBindingDescriptionCount = G_N_ELEMENTS (vertexBindingDescriptions),
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.pVertexBindingDescriptions = vertexBindingDescriptions,
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.vertexAttributeDescriptionCount = G_N_ELEMENTS (vertexInputAttributeDescription),
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.pVertexAttributeDescriptions = vertexInputAttributeDescription
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};
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return &info;
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}
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static void
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gsk_vulkan_texture_pipeline_finalize (GObject *gobject)
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{
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//GskVulkanTexturePipeline *self = GSK_VULKAN_TEXTURE_PIPELINE (gobject);
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G_OBJECT_CLASS (gsk_vulkan_texture_pipeline_parent_class)->finalize (gobject);
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}
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static void
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gsk_vulkan_texture_pipeline_class_init (GskVulkanTexturePipelineClass *klass)
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{
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GskVulkanPipelineClass *pipeline_class = GSK_VULKAN_PIPELINE_CLASS (klass);
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G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_texture_pipeline_finalize;
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pipeline_class->get_input_state_create_info = gsk_vulkan_texture_pipeline_get_input_state_create_info;
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}
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static void
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gsk_vulkan_texture_pipeline_init (GskVulkanTexturePipeline *self)
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{
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}
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GskVulkanPipeline *
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gsk_vulkan_texture_pipeline_new (GdkVulkanContext *context,
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VkPipelineLayout layout,
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const char *shader_name,
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VkRenderPass render_pass)
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{
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return gsk_vulkan_pipeline_new (GSK_TYPE_VULKAN_TEXTURE_PIPELINE, context, layout, shader_name, render_pass);
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}
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gsize
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gsk_vulkan_texture_pipeline_count_vertex_data (GskVulkanTexturePipeline *pipeline)
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{
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return sizeof (GskVulkanTextureInstance);
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}
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void
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gsk_vulkan_texture_pipeline_collect_vertex_data (GskVulkanTexturePipeline *pipeline,
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guchar *data,
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const graphene_rect_t *rect,
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const graphene_rect_t *tex_rect)
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{
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GskVulkanTextureInstance *instance = (GskVulkanTextureInstance *) data;
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instance->rect[0] = rect->origin.x;
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instance->rect[1] = rect->origin.y;
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instance->rect[2] = rect->size.width;
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instance->rect[3] = rect->size.height;
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instance->tex_rect[0] = tex_rect->origin.x;
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instance->tex_rect[1] = tex_rect->origin.y;
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instance->tex_rect[2] = tex_rect->size.width;
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instance->tex_rect[3] = tex_rect->size.height;
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}
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gsize
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gsk_vulkan_texture_pipeline_draw (GskVulkanTexturePipeline *pipeline,
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VkCommandBuffer command_buffer,
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gsize offset,
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gsize n_commands)
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{
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vkCmdDraw (command_buffer,
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6, n_commands,
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0, offset);
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return n_commands;
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}
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