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API for changing the background image of OS windows

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Uses reference counting
This commit is contained in:
Kovid Goyal
2020-02-01 09:17:41 +05:30
parent 0fa3cec61f
commit 8116ee015a
5 changed files with 107 additions and 46 deletions
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27
kitty/shaders.c
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@@ -355,9 +355,9 @@ draw_bg(OSWindow *w) {
bgimage_constants_set = true;
}
glUniform4f(bgimage_program_layout.sizes_location,
(GLfloat)w->window_width, (GLfloat)w->window_height, (GLfloat)w->bgimage.width, (GLfloat)w->bgimage.height);
(GLfloat)w->window_width, (GLfloat)w->window_height, (GLfloat)w->bgimage->width, (GLfloat)w->bgimage->height);
glActiveTexture(GL_TEXTURE0 + BGIMAGE_UNIT);
glBindTexture(GL_TEXTURE_2D, w->bgimage.texture_id);
glBindTexture(GL_TEXTURE_2D, w->bgimage->texture_id);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
unbind_vertex_array();
unbind_program();
@@ -428,6 +428,11 @@ draw_cells_simple(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen) {
}
}
static inline bool
has_bgimage(OSWindow *w) {
return w->bgimage && w->bgimage->texture_id > 0;
}
static void
draw_cells_interleaved(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen, OSWindow *w) {
glEnable(GL_BLEND);
@@ -435,12 +440,12 @@ draw_cells_interleaved(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen, OSWind
bind_program(CELL_BG_PROGRAM);
// draw background for all cells
if (!w->bgimage.texture_id) {
if (!has_bgimage(w)) {
glUniform1ui(cell_program_layouts[CELL_BG_PROGRAM].draw_bg_bitfield_location, 3);
glDrawArraysInstanced(GL_TRIANGLE_FAN, 0, 4, screen->lines * screen->columns);
}
if (screen->grman->num_of_below_refs || w->bgimage.texture_id) {
if (screen->grman->num_of_below_refs || has_bgimage(w)) {
if (screen->grman->num_of_below_refs) draw_graphics(
GRAPHICS_PROGRAM, vao_idx, gvao_idx, screen->grman->render_data, 0, screen->grman->num_of_below_refs);
bind_program(CELL_BG_PROGRAM);
@@ -479,7 +484,7 @@ draw_cells_interleaved_premult(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, os_window->offscreen_texture_id, 0);
/* if (glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) fatal("Offscreen framebuffer not complete"); */
bind_program(CELL_BG_PROGRAM);
if (!os_window->bgimage.texture_id) {
if (!has_bgimage(os_window)) {
// draw background for all cells
glUniform1ui(cell_program_layouts[CELL_BG_PROGRAM].draw_bg_bitfield_location, 3);
glDrawArraysInstanced(GL_TRIANGLE_FAN, 0, 4, screen->lines * screen->columns);
@@ -487,7 +492,7 @@ draw_cells_interleaved_premult(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen
glEnable(GL_BLEND);
BLEND_PREMULT;
if (screen->grman->num_of_below_refs || os_window->bgimage.texture_id) {
if (screen->grman->num_of_below_refs || has_bgimage(os_window)) {
if (screen->grman->num_of_below_refs) draw_graphics(
GRAPHICS_PREMULT_PROGRAM, vao_idx, gvao_idx, screen->grman->render_data, 0, screen->grman->num_of_below_refs);
bind_program(CELL_BG_PROGRAM);
@@ -513,7 +518,7 @@ draw_cells_interleaved_premult(ssize_t vao_idx, ssize_t gvao_idx, Screen *screen
if (screen->grman->num_of_positive_refs) draw_graphics(GRAPHICS_PREMULT_PROGRAM, vao_idx, gvao_idx, screen->grman->render_data, screen->grman->num_of_negative_refs + screen->grman->num_of_below_refs, screen->grman->num_of_positive_refs);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
if (!os_window->bgimage.texture_id) glDisable(GL_BLEND);
if (!has_bgimage(os_window)) glDisable(GL_BLEND);
glEnable(GL_SCISSOR_TEST);
// Now render the framebuffer to the screen
@@ -602,10 +607,10 @@ draw_cells(ssize_t vao_idx, ssize_t gvao_idx, GLfloat xstart, GLfloat ystart, GL
);
#undef SCALE
if (os_window->is_semi_transparent) {
if (screen->grman->count || os_window->bgimage.texture_id) draw_cells_interleaved_premult(vao_idx, gvao_idx, screen, os_window);
if (screen->grman->count || has_bgimage(os_window)) draw_cells_interleaved_premult(vao_idx, gvao_idx, screen, os_window);
else draw_cells_simple(vao_idx, gvao_idx, screen);
} else {
if (screen->grman->num_of_negative_refs || screen->grman->num_of_below_refs || os_window->bgimage.texture_id) draw_cells_interleaved(vao_idx, gvao_idx, screen, os_window);
if (screen->grman->num_of_negative_refs || screen->grman->num_of_below_refs || has_bgimage(os_window)) draw_cells_interleaved(vao_idx, gvao_idx, screen, os_window);
else draw_cells_simple(vao_idx, gvao_idx, screen);
}
}
@@ -649,7 +654,7 @@ create_border_vao(void) {
void
draw_borders(ssize_t vao_idx, unsigned int num_border_rects, BorderRect *rect_buf, bool rect_data_is_dirty, uint32_t viewport_width, uint32_t viewport_height, color_type active_window_bg, unsigned int num_visible_windows, bool all_windows_have_same_bg, OSWindow *w) {
if (w->bgimage.texture_id) {
if (has_bgimage(w)) {
glEnable(GL_BLEND);
BLEND_ONTO_OPAQUE;
draw_bg(w);
@@ -677,7 +682,7 @@ draw_borders(ssize_t vao_idx, unsigned int num_border_rects, BorderRect *rect_bu
unbind_vertex_array();
unbind_program();
}
if (w->bgimage.texture_id) glDisable(GL_BLEND);
if (has_bgimage(w)) glDisable(GL_BLEND);
}
// }}}