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feat: sRGB colors to shaders

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This commit is contained in:
Martin Wernstål 2023-01-23 19:22:48 +01:00
parent be61b4e95e
commit 2bc03852a1
1 changed files with 16 additions and 9 deletions
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25
kitty/shaders.c
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@ -10,6 +10,7 @@
#include "colors.h"
#include <stddef.h>
#include "window_logo.h"
#include "srgb_gamma.h"
#define BLEND_ONTO_OPAQUE glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // blending onto opaque colors
#define BLEND_ONTO_OPAQUE_WITH_OPAQUE_OUTPUT glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE); // blending onto opaque colors with final color having alpha 1
@ -29,6 +30,16 @@ typedef struct {
static const SpriteMap NEW_SPRITE_MAP = { .xnum = 1, .ynum = 1, .last_num_of_layers = 1, .last_ynum = -1 };
static GLint max_texture_size = 0, max_array_texture_layers = 0;
GLfloat
srgb_color(uint8_t color) {
return srgb_lut[color];
}
void
color_vec3(GLint location, color_type color) {
glUniform3f(location, srgb_lut[(color >> 16) & 0xFF], srgb_lut[(color >> 8) & 0xFF], srgb_lut[color & 0xFF]);
}
SPRITE_MAP_HANDLE
alloc_sprite_map(unsigned int cell_width, unsigned int cell_height) {
if (!max_texture_size) {
@ -498,9 +509,7 @@ draw_centered_alpha_mask(OSWindow *os_window, size_t screen_width, size_t screen
gpu_data_for_centered_image(data, screen_width, screen_height, width, height);
bind_program(GRAPHICS_ALPHA_MASK_PROGRAM);
glUniform1i(cell_uniform_data.amask_image_loc, GRAPHICS_UNIT);
#define CV3(x) (((float)((x >> 16) & 0xff))/255.f), (((float)((x >> 8) & 0xff))/255.f), (((float)(x & 0xff))/255.f)
glUniform3f(cell_uniform_data.amask_fg_loc, CV3(OPT(foreground)));
#undef CV3
color_vec3(cell_uniform_data.amask_fg_loc, OPT(foreground));
glUniform1f(cell_uniform_data.amask_premult_loc, os_window->is_semi_transparent ? 1.f : 0.f);
send_graphics_data_to_gpu(1, os_window->gvao_idx, data);
glEnable(GL_BLEND);
@ -536,7 +545,7 @@ draw_tint(bool premult, Screen *screen, const CellRenderData *crd) {
if (premult) { BLEND_PREMULT } else { BLEND_ONTO_OPAQUE_WITH_OPAQUE_OUTPUT }
bind_program(TINT_PROGRAM);
color_type window_bg = colorprofile_to_color(screen->color_profile, screen->color_profile->overridden.default_bg, screen->color_profile->configured.default_bg).rgb;
#define C(shift) ((((GLfloat)((window_bg >> shift) & 0xFF)) / 255.0f)) * premult_factor
#define C(shift) srgb_color((window_bg >> shift) & 0xFF) * premult_factor
GLfloat premult_factor = premult ? OPT(background_tint) : 1.0f;
glUniform4f(tint_program_layout.tint_color_location, C(16), C(8), C(0), OPT(background_tint));
#undef C
@ -707,9 +716,7 @@ draw_window_number(OSWindow *os_window, Screen *screen, const CellRenderData *cr
BLEND_PREMULT;
glUniform1i(cell_uniform_data.amask_image_loc, GRAPHICS_UNIT);
color_type digit_color = colorprofile_to_color_with_fallback(screen->color_profile, screen->color_profile->overridden.highlight_bg, screen->color_profile->configured.highlight_bg, screen->color_profile->overridden.default_fg, screen->color_profile->configured.default_fg);
#define CV3(x) (((float)((x >> 16) & 0xff))/255.f), (((float)((x >> 8) & 0xff))/255.f), (((float)(x & 0xff))/255.f)
glUniform3f(cell_uniform_data.amask_fg_loc, CV3(digit_color));
#undef CV3
color_vec3(cell_uniform_data.amask_fg_loc, digit_color);
glUniform1f(cell_uniform_data.amask_premult_loc, 1.f);
send_graphics_data_to_gpu(1, os_window->gvao_idx, ird);
draw_graphics(GRAPHICS_ALPHA_MASK_PROGRAM, 0, os_window->gvao_idx, ird, 0, 1);
@ -726,7 +733,7 @@ draw_visual_bell_flash(GLfloat intensity, const CellRenderData *crd, Screen *scr
#define COLOR(name, fallback) colorprofile_to_color_with_fallback(screen->color_profile, screen->color_profile->overridden.name, screen->color_profile->configured.name, screen->color_profile->overridden.fallback, screen->color_profile->configured.fallback)
const color_type flash = !IS_SPECIAL_COLOR(highlight_bg) ? COLOR(visual_bell_color, highlight_bg) : COLOR(visual_bell_color, default_fg);
#undef COLOR
#define C(shift) ((((GLfloat)((flash >> shift) & 0xFF)) / 255.0f) )
#define C(shift) srgb_color((flash >> shift) & 0xFF)
const GLfloat r = C(16), g = C(8), b = C(0);
const GLfloat max_channel = r > g ? (r > b ? r : b) : (g > b ? g : b);
#undef C
@ -862,7 +869,7 @@ draw_cells_interleaved_premult(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen
void
blank_canvas(float background_opacity, color_type color) {
// See https://github.com/glfw/glfw/issues/1538 for why we use pre-multiplied alpha
#define C(shift) ((((GLfloat)((color >> shift) & 0xFF)) / 255.0f) * background_opacity)
#define C(shift) srgb_color((color >> shift) & 0xFF)
glClearColor(C(16), C(8), C(0), background_opacity);
#undef C
glClear(GL_COLOR_BUFFER_BIT);