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render/vulkan: Use image view swizzles instead of shader hack 

Signed-off-by: Joshua Ashton <joshua@froggi.es>
This commit is contained in:
Joshua Ashton 2021-10-16 15:31:48 +01:00 committed by Simon Ser
parent e22a386319
commit b62ce3c3c8
3 changed files with 13 additions and 23 deletions
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11
render/vulkan/renderer.c
View File

@ -794,17 +794,6 @@ static bool vulkan_render_subtexture_with_matrix(struct wlr_renderer *wlr_render
vert_pcr_data.uv_size[1] = -vert_pcr_data.uv_size[1];
}
// When the texture itself does not have alpha information we want
// to ignore the sampled value and just use the alpha passed here,
// we pass a negative value to communicate that.
// See the texture.frag shader for more details.
const struct wlr_pixel_format_info *format_info = drm_get_pixel_format_info(
texture->format->drm_format);
assert(format_info);
if (!format_info->has_alpha) {
alpha *= -1;
}
vkCmdPushConstants(cb, renderer->pipe_layout,
VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(vert_pcr_data), &vert_pcr_data);
vkCmdPushConstants(cb, renderer->pipe_layout,

11
render/vulkan/shaders/texture.frag
View File

@ -11,15 +11,6 @@ layout(push_constant) uniform UBO {
void main() {
out_color = textureLod(tex, uv, 0);
// We expect this shader to output pre-alpha-multiplied color values.
// alpha < 0.0 means that this shader should ignore the texture's alpha
// value.
if (data.alpha < 0.0) {
out_color.a = -data.alpha;
out_color.rgb *= -data.alpha;
} else {
out_color *= data.alpha;
}
out_color *= data.alpha;
}

14
render/vulkan/texture.c
View File

@ -288,6 +288,9 @@ static struct wlr_texture *vulkan_texture_from_pixels(struct wlr_renderer *wlr_r
goto error;
}
const struct wlr_pixel_format_info *format_info = drm_get_pixel_format_info(drm_fmt);
assert(format_info);
// view
VkImageViewCreateInfo view_info = {0};
view_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
@ -296,7 +299,9 @@ static struct wlr_texture *vulkan_texture_from_pixels(struct wlr_renderer *wlr_r
view_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.a = format_info->has_alpha
? VK_COMPONENT_SWIZZLE_IDENTITY
: VK_COMPONENT_SWIZZLE_ONE;
view_info.subresourceRange = (VkImageSubresourceRange) {
VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1
@ -613,6 +618,9 @@ static struct wlr_texture *vulkan_texture_from_dmabuf(struct wlr_renderer *wlr_r
// return VK_NULL_HANDLE;
}
const struct wlr_pixel_format_info *format_info = drm_get_pixel_format_info(attribs->format);
assert(format_info);
// view
VkImageViewCreateInfo view_info = {0};
view_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
@ -621,7 +629,9 @@ static struct wlr_texture *vulkan_texture_from_dmabuf(struct wlr_renderer *wlr_r
view_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
view_info.components.a = format_info->has_alpha
? VK_COMPONENT_SWIZZLE_IDENTITY
: VK_COMPONENT_SWIZZLE_ONE;
view_info.subresourceRange = (VkImageSubresourceRange) {
VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1