gtk/gsk/gl/gskglimage.c
2017-12-21 19:12:30 +01:00

69 lines
2.1 KiB
C

#include "gskglimageprivate.h"
#include <epoxy/gl.h>
void
gsk_gl_image_create (GskGLImage *self,
GskGLDriver *gl_driver,
int width,
int height)
{
self->texture_id = gsk_gl_driver_create_permanent_texture (gl_driver, width, height);
self->width = width;
self->height = height;
gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
gsk_gl_driver_init_texture_empty (gl_driver, self->texture_id);
}
void
gsk_gl_image_destroy (GskGLImage *self,
GskGLDriver *gl_driver)
{
gsk_gl_driver_destroy_texture (gl_driver, self->texture_id);
}
void
gsk_gl_image_write_to_png (const GskGLImage *self,
GskGLDriver *gl_driver,
const char *filename)
{
int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, self->width);
guchar *data = g_malloc (self->height * stride);
cairo_surface_t *s;
gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
glGetTexImage (GL_TEXTURE_2D, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, data);
s = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_ARGB32, self->width, self->height, stride);
cairo_surface_write_to_png (s, filename);
cairo_surface_destroy (s);
g_free (data);
}
void
gsk_gl_image_upload_regions (GskGLImage *self,
GskGLDriver *gl_driver,
guint n_regions,
const GskImageRegion *regions)
{
guint i;
for (i = 0; i < n_regions; i ++)
{
const GskImageRegion *region = &regions[i];
gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
glBindTexture (GL_TEXTURE_2D, self->texture_id);
glTexSubImage2D (GL_TEXTURE_2D, 0, region->x, region->y, region->width, region->height,
GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, region->data);
}
#ifdef G_ENABLE_DEBUG
/*gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);*/
/*gsk_gl_image_dump (self, gl_driver, "/home/baedert/atlases/test_dump.png");*/
#endif
}