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Add font render to texture
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@ -148,7 +148,7 @@ else()
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endif()
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# stb
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target_include_directories(${PROJECT_NAME} SYSTEM PRIVATE dependencies/stb)
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target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC dependencies/stb)
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# assimp
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set(BUILD_SHARED_LIBS OFF CACHE INTERNAL "" FORCE)
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@ -2,19 +2,33 @@
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#define ENGINE_INCLUDE_RESOURCES_FONT_H_
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#include <string>
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#include <map>
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#include <vector>
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#include <memory>
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#include <stb_truetype.h>
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namespace engine {
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namespace resources {
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class Font {
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public:
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Font(const std::string& path);
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~Font();
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Font(const Font&) = delete;
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Font& operator=(const Font&) = delete;
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std::unique_ptr<std::vector<uint8_t>> GetTextBitmap(const std::string& text,
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float height_px,
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int& width_out,
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int& height_out);
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private:
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std::unique_ptr<stbtt_fontinfo> font_info_{};
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std::unique_ptr<std::vector<uint8_t>> font_buffer_{};
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std::map<int, int> unicode_to_glyph_{};
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int GetGlyphIndex(int unicode_codepoint);
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};
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} // namespace resources
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@ -20,6 +20,9 @@ class Texture {
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Texture(RenderData* render_data, const std::string& path,
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Filtering filtering);
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Texture(RenderData* render_data, const uint8_t* bitmap, int width, int height,
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Filtering filtering);
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~Texture();
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Texture(const Texture&) = delete;
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Texture& operator=(const Texture&) = delete;
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@ -1,6 +1,7 @@
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#include "resources/font.h"
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#include <string>
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#include <stdexcept>
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#include <stb_truetype.h>
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@ -10,17 +11,117 @@
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namespace engine::resources {
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Font::Font(const std::string& path) {
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// auto font_buffer = util::ReadBinaryFile(path);
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font_buffer_ = util::ReadBinaryFile(path);
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font_info_ = std::make_unique<stbtt_fontinfo>();
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// constexpr int FIRST_CHAR = 32;
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// constexpr int NUM_CHARS = 96;
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// constexpr float SCALE = 128.0f;
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// TODO finish this
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if (stbtt_InitFont(font_info_.get(), font_buffer_->data(), 0) == 0) {
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throw std::runtime_error("Failed to initialise font!");
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}
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LOG_INFO("Loaded font: {}", path);
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}
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Font::~Font() {}
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std::unique_ptr<std::vector<uint8_t>> Font::GetTextBitmap(
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const std::string& text, float height_px, int& width_out, int& height_out) {
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const float sf = stbtt_ScaleForPixelHeight(font_info_.get(), height_px);
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int ascent, descent, line_gap;
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stbtt_GetFontVMetrics(font_info_.get(), &ascent, &descent, &line_gap);
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struct CharacterRenderInfo {
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int advance; // bitmap advance
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bool isEmpty;
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int xoff, yoff, width, height;
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unsigned char* bitmap;
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};
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std::vector<CharacterRenderInfo> characterRenderInfos{};
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int width = 0;
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for (size_t i = 0; i < text.size(); i++) {
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const int glyph_index = GetGlyphIndex(static_cast<int>(text.at(i)));
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int advanceWidth, leftSideBearing;
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stbtt_GetGlyphHMetrics(font_info_.get(), glyph_index, &advanceWidth,
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&leftSideBearing);
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if (i == 0 && leftSideBearing < 0) {
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// if the character extends before the current point
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width -= leftSideBearing;
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}
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width += advanceWidth;
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CharacterRenderInfo renderInfo{};
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renderInfo.advance = advanceWidth * sf;
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if (stbtt_IsGlyphEmpty(font_info_.get(), glyph_index) == 0) {
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renderInfo.isEmpty = false;
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} else {
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renderInfo.isEmpty = true;
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}
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if (!renderInfo.isEmpty) {
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renderInfo.bitmap = stbtt_GetGlyphBitmap(
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font_info_.get(), sf, sf, glyph_index, &renderInfo.width,
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&renderInfo.height, &renderInfo.xoff, &renderInfo.yoff);
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}
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characterRenderInfos.push_back(renderInfo);
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}
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const size_t bitmap_width = std::ceil(static_cast<float>(width) * sf);
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const size_t bitmap_height =
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std::ceil(static_cast<float>(ascent - descent) * sf);
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auto bitmap =
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std::make_unique<std::vector<uint8_t>>(bitmap_width * bitmap_height * 4);
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int top_left_x = 0;
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for (const auto& renderInfo : characterRenderInfos) {
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if (renderInfo.isEmpty == false) {
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top_left_x += renderInfo.xoff;
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const int top_left_y = static_cast<int>(ascent * sf) + renderInfo.yoff;
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const int char_bitmap_width = renderInfo.width;
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const int char_bitmap_height = renderInfo.height;
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// copy the 8bpp char bitmap to the 4bpp output
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for (int y = 0; y < char_bitmap_height; y++) {
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for (int x = 0; x < char_bitmap_width; x++) {
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const int out_index =
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((bitmap_width * (top_left_y + y)) + (top_left_x + x)) * 4;
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const uint8_t pixel = renderInfo.bitmap[y * char_bitmap_width + x];
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(*bitmap)[out_index + 0] = pixel;
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(*bitmap)[out_index + 1] = pixel;
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(*bitmap)[out_index + 2] = pixel;
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(*bitmap)[out_index + 3] = 0xFF;
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}
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}
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stbtt_FreeBitmap(renderInfo.bitmap, nullptr);
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}
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top_left_x += renderInfo.advance - renderInfo.xoff;
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}
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width_out = bitmap_width;
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height_out = bitmap_height;
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return bitmap;
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}
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int Font::GetGlyphIndex(int unicode_codepoint) {
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if (unicode_to_glyph_.contains(unicode_codepoint)) {
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return unicode_to_glyph_.at(unicode_codepoint);
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} else {
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const int glyph_index =
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stbtt_FindGlyphIndex(font_info_.get(), unicode_codepoint);
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if (glyph_index == 0) {
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throw std::runtime_error("Glyph not found in font!");
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}
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unicode_to_glyph_.emplace(std::make_pair(unicode_codepoint, glyph_index));
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return glyph_index;
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}
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}
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} // namespace engine::resources
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@ -8,12 +8,12 @@
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namespace engine::resources {
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Texture::Texture(RenderData* renderData, const std::string& path, Filtering filtering)
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: gfx_(renderData->gfxdev.get())
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{
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Texture::Texture(RenderData* renderData, const std::string& path,
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Filtering filtering)
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: gfx_(renderData->gfxdev.get()) {
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int width, height;
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std::unique_ptr<std::vector<uint8_t>> texbuf = util::ReadImageFile(path, &width, &height);
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std::unique_ptr<std::vector<uint8_t>> texbuf =
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util::ReadImageFile(path, &width, &height);
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gfx::SamplerInfo samplerInfo{};
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@ -42,20 +42,62 @@ Texture::Texture(RenderData* renderData, const std::string& path, Filtering filt
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}
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if (renderData->samplers.contains(samplerInfo) == false) {
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renderData->samplers.insert(std::make_pair(samplerInfo, gfx_->CreateSampler(samplerInfo)));
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renderData->samplers.insert(
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std::make_pair(samplerInfo, gfx_->CreateSampler(samplerInfo)));
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}
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image_ = gfx_->CreateImage(width, height, texbuf->data());
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descriptor_set_ = gfx_->AllocateDescriptorSet(renderData->material_set_layout);
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gfx_->UpdateDescriptorCombinedImageSampler(descriptor_set_, 0, image_, renderData->samplers.at(samplerInfo));
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descriptor_set_ =
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gfx_->AllocateDescriptorSet(renderData->material_set_layout);
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gfx_->UpdateDescriptorCombinedImageSampler(
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descriptor_set_, 0, image_, renderData->samplers.at(samplerInfo));
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LOG_INFO("Loaded texture: {}, width: {} height: {}", path, width, height);
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}
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Texture::~Texture()
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{
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gfx_->DestroyImage(image_);
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Texture::Texture(RenderData* render_data, const uint8_t* bitmap, int width,
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int height, Filtering filtering)
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: gfx_(render_data->gfxdev.get()) {
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gfx::SamplerInfo samplerInfo{};
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samplerInfo.magnify = gfx::Filter::kLinear;
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switch (filtering) {
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case Filtering::kOff:
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samplerInfo.minify = gfx::Filter::kNearest;
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samplerInfo.mipmap = gfx::Filter::kNearest;
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samplerInfo.anisotropic_filtering = false;
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break;
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case Filtering::kBilinear:
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samplerInfo.minify = gfx::Filter::kLinear;
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samplerInfo.mipmap = gfx::Filter::kNearest;
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samplerInfo.anisotropic_filtering = false;
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break;
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case Filtering::kTrilinear:
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samplerInfo.minify = gfx::Filter::kLinear;
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samplerInfo.mipmap = gfx::Filter::kLinear;
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samplerInfo.anisotropic_filtering = false;
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break;
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case Filtering::kAnisotropic:
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samplerInfo.minify = gfx::Filter::kLinear;
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samplerInfo.mipmap = gfx::Filter::kLinear;
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samplerInfo.anisotropic_filtering = true;
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}
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if (render_data->samplers.contains(samplerInfo) == false) {
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render_data->samplers.insert(
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std::make_pair(samplerInfo, gfx_->CreateSampler(samplerInfo)));
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}
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image_ = gfx_->CreateImage(width, height, bitmap);
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descriptor_set_ =
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gfx_->AllocateDescriptorSet(render_data->material_set_layout);
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gfx_->UpdateDescriptorCombinedImageSampler(
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descriptor_set_, 0, image_, render_data->samplers.at(samplerInfo));
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LOG_INFO("Loaded texture: BITMAP, width: {} height: {}", width, height);
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}
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Texture::~Texture() { gfx_->DestroyImage(image_); }
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} // namespace engine::resources
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@ -7,6 +7,7 @@
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#include "components/transform.h"
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#include "input_manager.h"
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#include "meshgen.hpp"
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#include "resources/font.h"
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#include "resources/material.h"
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#include "resources/texture.h"
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#include "scene.h"
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@ -86,6 +87,7 @@ void PlayGame(GameSettings settings) {
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auto grass_texture = std::make_shared<engine::resources::Texture>(
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&app.render_data_, app.GetResourcePath("textures/grass.jpg"),
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engine::resources::Texture::Filtering::kAnisotropic);
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auto space_texture = std::make_shared<engine::resources::Texture>(
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&app.render_data_, app.GetResourcePath("textures/space2.png"),
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engine::resources::Texture::Filtering::kAnisotropic);
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@ -99,8 +101,8 @@ void PlayGame(GameSettings settings) {
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my_scene->AddComponent<engine::RenderableComponent>(cube);
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cube_renderable->material = std::make_shared<engine::resources::Material>(
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app.GetResource<engine::resources::Shader>("builtin.standard"));
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cube_renderable->material->texture_ =
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app.GetResource<engine::resources::Texture>("builtin.white");
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cube_renderable->material->texture_ = grass_texture;
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// app.GetResource<engine::resources::Texture>("builtin.white");
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cube_renderable->mesh = GenCuboidMesh(app.gfxdev(), 1.0f, 1.0f, 1.0f, 1);
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auto cube_collider =
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my_scene->AddComponent<engine::ColliderComponent>(cube);
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@ -127,8 +129,8 @@ void PlayGame(GameSettings settings) {
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floor_collider->aabb = {{0.0f, 0.0f, 0.0f}, {10000.0f, 1.0f, 10000.0f}};
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}
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engine::util::LoadMeshFromFile(
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my_scene, app.GetResourcePath("models/astronaut/astronaut.dae"));
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//engine::util::LoadMeshFromFile(
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// my_scene, app.GetResourcePath("models/astronaut/astronaut.dae"));
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/* skybox */
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{
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