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lib: Add a helper to paint a PNG using cairo

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Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
This commit is contained in:
Damien Lespiau 2013-08-23 16:46:45 +01:00
parent 30e0710ca3
commit bde7060e3c
2 changed files with 30 additions and 0 deletions
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28
lib/drmtest.c
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@ -1475,6 +1475,34 @@ void kmstest_paint_test_pattern(cairo_t *cr, int width, int height)
assert(!cairo_status(cr)); assert(!cairo_status(cr));
} }
void kmstest_paint_image(cairo_t *cr, const char *filename,
int dst_x, int dst_y, int dst_width, int dst_height)
{
cairo_surface_t *image;
int img_width, img_height;
double scale_x, scale_y;
image = cairo_image_surface_create_from_png(filename);
assert(cairo_surface_status(image) == CAIRO_STATUS_SUCCESS);
img_width = cairo_image_surface_get_width(image);
img_height = cairo_image_surface_get_height(image);
scale_x = (double)dst_width / img_width;
scale_y = (double)dst_height / img_height;
cairo_save(cr);
cairo_translate(cr, dst_x, dst_y);
cairo_scale(cr, scale_x, scale_y);
cairo_set_source_surface(cr, image, 0, 0);
cairo_paint(cr);
cairo_surface_destroy(image);
cairo_restore(cr);
}
#define DF(did, cid, _bpp, _depth) \ #define DF(did, cid, _bpp, _depth) \
{ DRM_FORMAT_##did, CAIRO_FORMAT_##cid, # did, _bpp, _depth } { DRM_FORMAT_##did, CAIRO_FORMAT_##cid, # did, _bpp, _depth }
static struct format_desc_struct { static struct format_desc_struct {

2
lib/drmtest.h
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@ -355,6 +355,8 @@ cairo_t *kmstest_get_cairo_ctx(int fd, struct kmstest_fb *fb);
void kmstest_paint_color_gradient(cairo_t *cr, int x, int y, int w, int h, void kmstest_paint_color_gradient(cairo_t *cr, int x, int y, int w, int h,
int r, int g, int b); int r, int g, int b);
void kmstest_paint_test_pattern(cairo_t *cr, int width, int height); void kmstest_paint_test_pattern(cairo_t *cr, int width, int height);
void kmstest_paint_image(cairo_t *cr, const char *filename,
int dst_x, int dst_y, int dst_width, int dst_height);
void kmstest_dump_mode(drmModeModeInfo *mode); void kmstest_dump_mode(drmModeModeInfo *mode);
int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id); int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
const char *kmstest_format_str(uint32_t drm_format); const char *kmstest_format_str(uint32_t drm_format);