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lua-imlib2: Implement Stride in a standard way

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Simon Lees 2024-02-22 11:01:07 +10:30 committed by Brenden Matthews
parent 3397155da4
commit 01ca581259
1 changed files with 5 additions and 3 deletions
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8
lua/libcairo_imlib2_helper.h
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@ -31,7 +31,7 @@
void cairo_draw_image(const char *file, cairo_surface_t *cs, int x, int y, void cairo_draw_image(const char *file, cairo_surface_t *cs, int x, int y,
double scale_x, double scale_y, double *return_scale_w, double scale_x, double scale_y, double *return_scale_w,
double *return_scale_h) { double *return_scale_h) {
int w, h; int w, h, stride;
double scaled_w, scaled_h; double scaled_w, scaled_h;
Imlib_Image premul; Imlib_Image premul;
cairo_surface_t *result; cairo_surface_t *result;
@ -83,10 +83,12 @@ void cairo_draw_image(const char *file, cairo_surface_t *cs, int x, int y,
/* and use the alpha channel of the source image */ /* and use the alpha channel of the source image */
imlib_image_copy_alpha_to_image(image, 0, 0); imlib_image_copy_alpha_to_image(image, 0, 0);
stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, scaled_w);
/* now pass the result to cairo */ /* now pass the result to cairo */
result = cairo_image_surface_create_for_data( result = cairo_image_surface_create_for_data(
(unsigned char *)imlib_image_get_data_for_reading_only(), (void *)imlib_image_get_data_for_reading_only(), CAIRO_FORMAT_ARGB32,
CAIRO_FORMAT_ARGB32, scaled_w, scaled_h, sizeof(DATA32) * scaled_w); scaled_w, scaled_h, stride);
cr = cairo_create(cs); cr = cairo_create(cs);
cairo_set_source_surface(cr, result, x, y); cairo_set_source_surface(cr, result, x, y);