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Bloom: Support sizes

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This commit is contained in:
Bill Kendrick 2023-04-22 10:58:42 -07:00
parent 03e0bf65b0
commit f5a340a152
2 changed files with 26 additions and 7 deletions
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28
magic/src/bloom.c
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@ -3,7 +3,7 @@
Applies a "bloom" effect to the image.
(https://en.wikipedia.org/wiki/Bloom_(shader_effect))
Last updated: February 27, 2023
Last updated: April 22, 2023
*/
#include <stdio.h>
@ -16,13 +16,13 @@
#include "SDL_mixer.h"
/* Radius of the painting tool */
#define BLOOM_PAINT_RADIUS 24
static int BLOOM_PAINT_RADIUS = 24;
/* Overall weight to apply the sampled pixels */
#define BLOOM_WEIGHT_CONST 0.05
/* Length of spike shape */
#define BLOOM_SPIKE_LENGTH 5
static int BLOOM_SPIKE_LENGTH = 5;
/* From https://www.shadertoy.com/view/lsXGWn */
//float sample_weights[9] = {
@ -42,7 +42,7 @@ Uint8 * bloom_mask = NULL;
int bloom_scale;
Uint32 bloom_api_version(void);
int bloom_init(magic_api * api);
int bloom_init(magic_api * api, Uint32 disabled_features);
int bloom_get_tool_count(magic_api * api);
SDL_Surface *bloom_get_icon(magic_api * api, int which);
char *bloom_get_name(magic_api * api, int which);
@ -80,7 +80,7 @@ Uint32 bloom_api_version(void)
return (TP_MAGIC_API_VERSION);
}
int bloom_init(magic_api * api)
int bloom_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
{
char fname[1024];
@ -381,3 +381,21 @@ float luminance(float r, float g, float b) {
float change_luminance(float c_in, float l_in, float l_out) {
return c_in * (l_out / l_in);
}
Uint8 bloom_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return 4;
}
Uint8 bloom_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return 2;
}
void bloom_set_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 size, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
BLOOM_PAINT_RADIUS = size * 12;
BLOOM_SPIKE_LENGTH = sqrt(BLOOM_PAINT_RADIUS + 1);
bloom_scale = sqrt(2 * (BLOOM_PAINT_RADIUS * BLOOM_PAINT_RADIUS));
}