90 lines
1.9 KiB
C++
90 lines
1.9 KiB
C++
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#include <pd/image/image.hpp>
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#if defined(PD_INCLUDE_STB_IMAGE)
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#define STB_IMAGE_IMPLEMENTATION
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#endif
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#include <stb_image.h>
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namespace PD {
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PD_API Image::Image() {}
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PD_API Image::Image(const std::string& path) { Load(path); }
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PD_API Image::Image(const std::vector<u8>& buf) { Load(buf); }
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PD_API Image::Image(const std::vector<u8>& pixels, int w, int h, int bpp) {
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Copy(pixels, w, h, bpp);
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}
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PD_API Image::~Image() {}
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PD_API void Image::Load(const u8* buf, size_t size) {
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int w = 0, h = 0, c = 0;
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u8* img = stbi_load_from_memory(buf, size, &w, &h, &c, 4);
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if (c == 3) {
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stbi_image_free(img);
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img = stbi_load_from_memory(buf, size, &w, &h, &c, 3);
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pFormat = Format::RGB;
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}
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pData.assign(img, img + (w * h * c));
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pSize = ivec2(w, h);
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stbi_image_free(img);
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}
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PD_API void Image::Load(const std::string& path) {
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int w = 0, h = 0, c = 0;
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u8* img = stbi_load(path.c_str(), &w, &h, &c, 4);
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if (c == 3) {
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stbi_image_free(img);
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img = stbi_load(path.c_str(), &w, &h, &c, 3);
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pFormat = Format::RGB;
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}
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pData.assign(img, img + (w * h * c));
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pSize = ivec2(w, h);
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stbi_image_free(img);
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}
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PD_API void Image::Load(const std::vector<u8>& buf) {
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Load(buf.data(), buf.size());
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}
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PD_API void Image::Copy(const std::vector<u8>& pixels, int w, int h, int bpp) {
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pData = pixels;
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pSize = ivec2(w, h);
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pFormat = GuessFmtFromBpp(bpp);
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}
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PD_API int Image::Format2Bpp(Format fmt) {
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switch (fmt) {
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case Format::RGBA:
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case Format::ABGR:
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case Format::BGRA:
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return 4;
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case Format::BGR:
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case Format::RGB:
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return 3;
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case Format::RGB565:
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return 2;
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}
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return 0;
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}
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PD_API Image::Format Image::GuessFmtFromBpp(int bpp) {
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/** Only return defaults here */
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switch (bpp) {
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case 4:
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return Format::RGBA;
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case 3:
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return Format::RGB;
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case 2:
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return Format::RGB565;
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default:
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return Format::RGBA;
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}
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}
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PD_API void Image::Flip(bool hz, bool vt) {
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// TODO
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}
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} // namespace PD
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