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good glyph gen

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Signed-off-by: Slendi <slendi@socopon.com>
This commit is contained in:
Slendi
2025-10-06 16:45:28 +03:00
parent 4cbdc572a9
commit 596f24becd
3 changed files with 35 additions and 15 deletions
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1
CMakeLists.txt
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@@ -34,6 +34,7 @@ FetchContent_MakeAvailable(raylib)
FetchContent_Declare(
msdfgen
GIT_REPOSITORY https://github.com/Chlumsky/msdfgen.git
GIT_TAG "v1.12.1"
GIT_SHALLOW 1
)
set(MSDFGEN_BUILD_STANDALONE OFF)

30
src/TextRenderer.cpp
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@@ -130,7 +130,7 @@ auto TextRenderer::generate_glyph(FontRuntime &rt, FontData &fd,
msdfgen::FONT_SCALING_EM_NORMALIZED, &advance_em))
return std::nullopt;
shape.normalize();
msdfgen::edgeColoringSimple(shape, 3.0);
msdfgen::edgeColoringInkTrap(shape, 3.0);
auto bounds = shape.getBounds();
float const width_em = static_cast<float>(bounds.r - bounds.l);
float const height_em = static_cast<float>(bounds.t - bounds.b);
@@ -172,14 +172,11 @@ auto TextRenderer::generate_glyph(FontRuntime &rt, FontData &fd,
int const dst_y = bmp_h - 1 - y;
for (int x = 0; x < bmp_w; ++x) {
float const *px = msdf_bitmap(x, y);
auto const clamp = [](float v) {
printf("%.2f ", v);
return static_cast<unsigned char>(
std::lround(std::clamp(v, 0.0f, 1.0f) * 255.0f));
};
auto const r = msdfgen::pixelFloatToByte(px[0]);
auto const g = msdfgen::pixelFloatToByte(px[1]);
auto const b = msdfgen::pixelFloatToByte(px[2]);
buffer[static_cast<size_t>(dst_y) * bmp_w + x]
= Color { clamp(px[0]), clamp(px[1]), clamp(px[2]), 255 };
printf("\n");
= Color { r, g, b, 255 };
}
}
@@ -237,11 +234,15 @@ auto TextRenderer::ensure_glyph(FontRuntime &rt, FontData &fd, u32 glyph_index,
TextRenderer::TextRenderer()
{
static char const msdf_vs_data[] {
#embed "base.vs"
, 0
};
static char const msdf_fs_data[] {
#embed "msdf.fs"
, 0
};
m_msdf_shader = LoadShaderFromMemory(nullptr, msdf_fs_data);
m_msdf_shader = LoadShaderFromMemory(msdf_vs_data, msdf_fs_data);
assert(IsShaderValid(m_msdf_shader));
m_px_range_uniform = GetShaderLocation(m_msdf_shader, "pxRange");
}
@@ -347,12 +348,11 @@ auto TextRenderer::draw_text(FontHandle const font, std::string_view const text,
float pen_y_em = 0.0f;
rt.frame_stamp++;
// BeginShaderMode(m_msdf_shader);
BeginShaderMode(m_msdf_shader);
if (m_px_range_uniform >= 0) {
float shader_px_range = rt.px_range;
// SetShaderValue(
// m_msdf_shader, m_px_range_uniform, &shader_px_range,
// SHADER_UNIFORM_FLOAT);
SetShaderValue(m_msdf_shader, m_px_range_uniform, &shader_px_range,
SHADER_UNIFORM_FLOAT);
}
for (unsigned i = 0; i < length; ++i) {
@@ -395,7 +395,7 @@ auto TextRenderer::draw_text(FontHandle const font, std::string_view const text,
pen_y_em += hb_to_em(positions[i].y_advance, rt.units_per_em);
}
// EndShaderMode();
EndShaderMode();
hb_buffer_destroy(buffer);
auto const draw_end = std::chrono::steady_clock::now();
@@ -426,7 +426,7 @@ auto TextRenderer::load_font(std::filesystem::path const &path)
runtime->pen_x = kAtlasPadding;
runtime->pen_y = kAtlasPadding;
runtime->row_height = 0;
runtime->px_range = kDefaultPxRange;
runtime->px_range = 0.05; // kDefaultPxRange;
runtime->em_scale = kDefaultEmScale;
runtime->frame_stamp = 0;
runtime->units_per_em

19
src/base.vs Normal file
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@@ -0,0 +1,19 @@
#version 100
attribute vec3 vertexPosition;
attribute vec2 vertexTexCoord;
attribute vec3 vertexNormal;
attribute vec4 vertexColor;
uniform mat4 mvp;
varying vec2 fragTexCoord;
varying vec4 fragColor;
void main()
{
fragTexCoord = vertexTexCoord;
fragColor = vertexColor;
gl_Position = mvp*vec4(vertexPosition, 1.0);
}