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Allow specifying a right_margin that is not rendered for the CSD title

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Can void double rendering if I ever decide to add button to the titlebar
This commit is contained in:
Kovid Goyal 2021-04-01 22:50:54 +05:30
parent 802147e255
commit e209c3329b
No known key found for this signature in database
GPG Key ID: 06BC317B515ACE7C
6 changed files with 21 additions and 29 deletions
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2
glfw/glfw3.h vendored
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@ -1683,7 +1683,7 @@ typedef void (* GLFWjoystickfun)(int,int);
typedef void (* GLFWuserdatafun)(unsigned long long, void*);
typedef void (* GLFWtickcallback)(void*);
typedef bool (* GLFWdrawtextfun)(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset);
typedef bool (* GLFWdrawtextfun)(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset, size_t right_margin);
/*! @brief Video mode type.
*

2
glfw/wl_client_side_decorations.c vendored
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@ -55,7 +55,7 @@ render_title_bar(_GLFWwindow *window, bool to_front_buffer) {
uint8_t *output = to_front_buffer ? decs.top.buffer.data.front : decs.top.buffer.data.back;
if (window->wl.title && window->wl.title[0] && _glfw.callbacks.draw_text) {
uint32_t fg_color = is_focused ? 0xff444444 : 0xff888888;
if (_glfw.callbacks.draw_text((GLFWwindow*)window, window->wl.title, fg_color, bg_color, output, decs.top.buffer.width, decs.top.buffer.height, 0, 0)) return;
if (_glfw.callbacks.draw_text((GLFWwindow*)window, window->wl.title, fg_color, bg_color, output, decs.top.buffer.width, decs.top.buffer.height, 0, 0, 0)) return;
}
for (uint32_t *px = (uint32_t*)output, *end = (uint32_t*)(output + decs.top.buffer.size_in_bytes); px < end; px++) {
*px = bg_color;

38
kitty/freetype_render_ui_text.c
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@ -98,19 +98,6 @@ get_load_flags(int hinting, int hintstyle, int base) {
return flags;
}
static inline unsigned int
width_for_char(Face *face, char_type ch) {
unsigned int ans = 0;
int glyph_index = FT_Get_Char_Index(face->freetype, ch);
if (glyph_index) {
int error = FT_Load_Glyph(face->freetype, glyph_index, get_load_flags(face->hinting, face->hintstyle, FT_LOAD_DEFAULT));
if (!error) {
ans = (unsigned int)ceilf((float)face->freetype->glyph->metrics.horiAdvance / 64.f);
}
}
return ans;
}
static bool
load_font(FontConfigFace *info, Face *ans) {
ans->freetype = native_face_from_path(info->path, info->index);
@ -159,7 +146,7 @@ set_pixel_size(RenderCtx *ctx, Face *face, FT_UInt sz, bool get_metrics UNUSED)
typedef struct RenderState {
uint32_t pending_in_buffer, fg, bg;
pixel *output;
size_t output_width, output_height;
size_t output_width, output_height, stride;
Face *current_face;
float x, y;
int y_offset;
@ -207,7 +194,7 @@ alpha_blend_premult(pixel over, pixel under) {
static void
render_color_bitmap(ProcessedBitmap *src, RenderState *rs) {
for (size_t sr = rs->src.top, dr = rs->dest.top; sr < rs->src.bottom && dr < rs->dest.bottom; sr++, dr++) {
pixel *dest_row = rs->output + rs->output_width * dr;
pixel *dest_row = rs->output + rs->stride * dr;
uint8_t *src_px = src->buf + src->stride * sr + 4 * rs->src.left;
for (size_t sc = rs->src.left, dc = rs->dest.left; sc < rs->src.right && dc < rs->dest.right; sc++, dc++, src_px += 4) {
pixel fg = premult_pixel(ARGB(src_px[3], src_px[2], src_px[1], src_px[0]), src_px[3]);
@ -219,7 +206,7 @@ render_color_bitmap(ProcessedBitmap *src, RenderState *rs) {
static void
render_gray_bitmap(ProcessedBitmap *src, RenderState *rs) {
for (size_t sr = rs->src.top, dr = rs->dest.top; sr < rs->src.bottom && dr < rs->dest.bottom; sr++, dr++) {
pixel *dest_row = rs->output + rs->output_width * dr;
pixel *dest_row = rs->output + rs->stride * dr;
uint8_t *src_row = src->buf + src->stride * sr;
for (size_t sc = rs->src.left, dc = rs->dest.left; sc < rs->src.right && dc < rs->dest.right; sc++, dc++) {
pixel fg = premult_pixel(rs->fg, src_row[sc]);
@ -439,12 +426,16 @@ process_codepoint(RenderCtx *ctx, RenderState *rs, char_type codep, char_type ne
}
bool
render_single_line(FreeTypeRenderCtx ctx_, const char *text, unsigned sz_px, pixel fg, pixel bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset) {
render_single_line(FreeTypeRenderCtx ctx_, const char *text, unsigned sz_px, pixel fg, pixel bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset, size_t right_margin) {
RenderCtx *ctx = (RenderCtx*)ctx_;
if (!ctx->created) return false;
size_t output_width = right_margin <= width ? width - right_margin : 0;
bool has_text = text && text[0];
pixel pbg = premult_pixel(bg, ((bg >> 24) & 0xff));
for (pixel *px = (pixel*)output_buf, *end = ((pixel*)output_buf) + width * height; px < end; px++) *px = pbg;
for (size_t y = 0; y < height; y++) {
pixel *px = (pixel*)(output_buf + 4 * y * width);
for (size_t x = (size_t)x_offset; x < output_width; x++) px[x] = pbg;
}
if (!has_text) return true;
hb_buffer_clear_contents(hb_buffer);
if (!hb_buffer_pre_allocate(hb_buffer, 512)) { PyErr_NoMemory(); return false; }
@ -457,7 +448,8 @@ render_single_line(FreeTypeRenderCtx ctx_, const char *text, unsigned sz_px, pix
set_pixel_size(ctx, &main_face, sz_px, true);
unsigned text_height = font_units_to_pixels_y(main_face.freetype, main_face.freetype->height);
RenderState rs = {
.current_face = &main_face, .fg = fg, .bg = bg, .output_width = width, .output_height = height,
.current_face = &main_face, .fg = fg, .bg = bg,
.output_width = output_width, .output_height = height, .stride = width,
.output = (pixel*)output_buf, .x = x_offset, .y = y_offset, .sz_px = sz_px
};
if (text_height < height) rs.y_offset = (height - text_height) / 2;
@ -504,18 +496,18 @@ render_line(PyObject *self UNUSED, PyObject *args, PyObject *kw) {
// use for testing as below
// kitty +runpy "from kitty.fast_data_types import *; open('/tmp/test.rgba', 'wb').write(freetype_render_line())" && convert -size 800x60 -depth 8 /tmp/test.rgba /tmp/test.png && icat /tmp/test.png
const char *text = "Test 猫 H🐱🚀b rendering with ellipsis for cut off text", *family = NULL;
unsigned int width = 800, height = 60;
unsigned int width = 800, height = 60, right_margin = 0;
int bold = 0, italic = 0;
unsigned long fg = 0, bg = 0xfffefefe;
float x_offset = 0, y_offset = 0;
static const char* kwlist[] = {"text", "width", "height", "font_family", "bold", "italic", "fg", "bg", "x_offset", "y_offset", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kw, "|sIIzppkkff", (char**)kwlist, &text, &width, &height, &family, &bold, &italic, &fg, &bg, &x_offset, &y_offset)) return NULL;
static const char* kwlist[] = {"text", "width", "height", "font_family", "bold", "italic", "fg", "bg", "x_offset", "y_offset", "right_margin", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kw, "|sIIzppkkffI", (char**)kwlist, &text, &width, &height, &family, &bold, &italic, &fg, &bg, &x_offset, &y_offset, &right_margin)) return NULL;
PyObject *ans = PyBytes_FromStringAndSize(NULL, width * height * 4);
if (!ans) return NULL;
uint8_t *buffer = (u_int8_t*) PyBytes_AS_STRING(ans);
RenderCtx *ctx = (RenderCtx*)create_freetype_render_context(family, bold, italic);
if (!ctx) return NULL;
if (!render_single_line((FreeTypeRenderCtx)ctx, text, 3 * height / 4, 0, 0xffffffff, buffer, width, height, x_offset, y_offset)) {
if (!render_single_line((FreeTypeRenderCtx)ctx, text, 3 * height / 4, 0, 0xffffffff, buffer, width, height, x_offset, y_offset, right_margin)) {
Py_CLEAR(ans);
if (!PyErr_Occurred()) PyErr_SetString(PyExc_RuntimeError, "Unknown error while rendering text");
ans = NULL;

2
kitty/freetype_render_ui_text.h
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@ -13,7 +13,7 @@ typedef struct {bool created;} *FreeTypeRenderCtx;
FreeTypeRenderCtx create_freetype_render_context(const char *family, bool bold, bool italic);
void set_main_face_family(FreeTypeRenderCtx ctx, const char *family, bool bold, bool italic);
bool render_single_line(FreeTypeRenderCtx ctx, const char *text, unsigned sz_px, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset);
bool render_single_line(FreeTypeRenderCtx ctx, const char *text, unsigned sz_px, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset, size_t right_margin);
void release_freetype_render_context(FreeTypeRenderCtx ctx);
typedef struct FontConfigFace {

2
kitty/glfw-wrapper.h generated
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@ -1421,7 +1421,7 @@ typedef void (* GLFWjoystickfun)(int,int);
typedef void (* GLFWuserdatafun)(unsigned long long, void*);
typedef void (* GLFWtickcallback)(void*);
typedef bool (* GLFWdrawtextfun)(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset);
typedef bool (* GLFWdrawtextfun)(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset, size_t right_margin);
/*! @brief Video mode type.
*

4
kitty/glfw.c
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@ -398,7 +398,7 @@ apple_file_open_callback(const char* filepath) {
static FreeTypeRenderCtx csd_title_render_ctx = NULL;
static bool
draw_text_callback(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset) {
draw_text_callback(GLFWwindow *window, const char *text, uint32_t fg, uint32_t bg, uint8_t *output_buf, size_t width, size_t height, float x_offset, float y_offset, size_t right_margin) {
if (!set_callback_window(window)) return false;
if (!csd_title_render_ctx) {
csd_title_render_ctx = create_freetype_render_context(NULL, true, false);
@ -413,7 +413,7 @@ draw_text_callback(GLFWwindow *window, const char *text, uint32_t fg, uint32_t b
px_sz = MIN(px_sz, 3 * height / 4);
static char title[2048];
snprintf(title, sizeof(title), "🐱 %s", text);
bool ok = render_single_line(csd_title_render_ctx, title, px_sz, fg, bg, output_buf, width, height, x_offset, y_offset);
bool ok = render_single_line(csd_title_render_ctx, title, px_sz, fg, bg, output_buf, width, height, x_offset, y_offset, right_margin);
if (!ok && PyErr_Occurred()) PyErr_Print();
return ok;
}