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gpu: Add gsk_gpu_image_get_projection_matrix()

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... and use it to initialize the "proper" projection matrix to use in
shaders.

The resulting viewport will go from top left (0,0) to bottom right
(width, height) and the z clipping plane will go from -10000 to 10000.
This commit is contained in:
Benjamin Otte
2023-08-24 03:15:01 +02:00
parent 1152c93778
commit 286b473f55
5 changed files with 76 additions and 15 deletions
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26
gsk/gpu/gskvulkanimage.c
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@@ -785,6 +785,25 @@ gsk_vulkan_image_new_for_offscreen (GskVulkanDevice *device,
return GSK_GPU_IMAGE (self);
}
static void
gsk_vulkan_image_get_projection_matrix (GskGpuImage *image,
graphene_matrix_t *out_projection)
{
graphene_matrix_t scale_z;
GSK_GPU_IMAGE_CLASS (gsk_vulkan_image_parent_class)->get_projection_matrix (image, out_projection);
graphene_matrix_init_from_float (&scale_z,
(float[16]) {
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 0.5, 0,
0, 0, 0.5, 1
});
graphene_matrix_multiply (out_projection, &scale_z, out_projection);
}
static void
gsk_vulkan_image_finalize (GObject *object)
{
@@ -817,7 +836,12 @@ gsk_vulkan_image_finalize (GObject *object)
static void
gsk_vulkan_image_class_init (GskVulkanImageClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_image_finalize;
GskGpuImageClass *image_class = GSK_GPU_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->get_projection_matrix = gsk_vulkan_image_get_projection_matrix;
object_class->finalize = gsk_vulkan_image_finalize;
}
static void