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a2368803fa
This now uses all the previously added features to allow displaying YUV images. Also add a utility function that turns an image into a toggle ref for a texture. This makes sure that reffing the image also refs the texture and that ensures that textures stay alive as long as the image is in use.
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
#include "config.h"
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#include "gskgpuimageprivate.h"
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typedef struct _GskGpuImagePrivate GskGpuImagePrivate;
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struct _GskGpuImagePrivate
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{
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GskGpuImageFlags flags;
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GdkMemoryFormat format;
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gsize width;
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gsize height;
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};
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#define ORTHO_NEAR_PLANE -10000
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#define ORTHO_FAR_PLANE 10000
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G_DEFINE_TYPE_WITH_PRIVATE (GskGpuImage, gsk_gpu_image, G_TYPE_OBJECT)
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static void
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gsk_gpu_image_get_default_projection_matrix (GskGpuImage *self,
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graphene_matrix_t *out_projection)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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graphene_matrix_init_ortho (out_projection,
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0, priv->width,
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0, priv->height,
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ORTHO_NEAR_PLANE,
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ORTHO_FAR_PLANE);
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}
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static void
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gsk_gpu_image_texture_toggle_ref_cb (gpointer texture,
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GObject *image,
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gboolean is_last_ref)
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{
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if (is_last_ref)
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g_object_unref (texture);
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else
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g_object_ref (texture);
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}
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static void
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gsk_gpu_image_dispose (GObject *object)
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{
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GskGpuImage *self = GSK_GPU_IMAGE (object);
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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if (priv->flags & GSK_GPU_IMAGE_TOGGLE_REF)
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{
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priv->flags &= ~GSK_GPU_IMAGE_TOGGLE_REF;
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G_OBJECT (self)->ref_count++;
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g_object_remove_toggle_ref (G_OBJECT (self), gsk_gpu_image_texture_toggle_ref_cb, NULL);
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}
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G_OBJECT_CLASS (gsk_gpu_image_parent_class)->dispose (object);
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}
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static void
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gsk_gpu_image_class_init (GskGpuImageClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = gsk_gpu_image_dispose;
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klass->get_projection_matrix = gsk_gpu_image_get_default_projection_matrix;
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}
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static void
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gsk_gpu_image_init (GskGpuImage *self)
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{
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}
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void
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gsk_gpu_image_setup (GskGpuImage *self,
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GskGpuImageFlags flags,
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GdkMemoryFormat format,
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gsize width,
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gsize height)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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priv->flags = flags;
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priv->format = format;
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priv->width = width;
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priv->height = height;
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}
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/*
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* gsk_gpu_image_toggle_ref_texture:
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* @self: a GskGpuImage
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* @texture: the texture owning @self
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*
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* This function must be called whenever the texture owns the data
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* used by the image. It will then add a toggle ref, so that ref'ing
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* the image will ref the texture and unrefing the image will unref it
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* again.
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*
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* This ensures that whenever the image is used, the texture will keep
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* being referenced and not go away. But once all the image's references
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* get unref'ed, the texture is free to go away.
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**/
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void
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gsk_gpu_image_toggle_ref_texture (GskGpuImage *self,
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GdkTexture *texture)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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g_assert ((priv->flags & GSK_GPU_IMAGE_TOGGLE_REF) == 0);
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priv->flags |= GSK_GPU_IMAGE_TOGGLE_REF;
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g_object_ref (texture);
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g_object_add_toggle_ref (G_OBJECT (self), gsk_gpu_image_texture_toggle_ref_cb, texture);
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g_object_unref (self);
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}
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GdkMemoryFormat
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gsk_gpu_image_get_format (GskGpuImage *self)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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return priv->format;
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}
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gsize
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gsk_gpu_image_get_width (GskGpuImage *self)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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return priv->width;
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}
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gsize
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gsk_gpu_image_get_height (GskGpuImage *self)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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return priv->height;
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}
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GskGpuImageFlags
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gsk_gpu_image_get_flags (GskGpuImage *self)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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return priv->flags;
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}
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void
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gsk_gpu_image_set_flags (GskGpuImage *self,
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GskGpuImageFlags flags)
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{
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GskGpuImagePrivate *priv = gsk_gpu_image_get_instance_private (self);
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priv->flags |= flags;
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}
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void
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gsk_gpu_image_get_projection_matrix (GskGpuImage *self,
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graphene_matrix_t *out_projection)
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{
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GSK_GPU_IMAGE_GET_CLASS (self)->get_projection_matrix (self, out_projection);
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}
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