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-rw-r--r--src/vk/qoi.cpp246
-rw-r--r--src/vk/qoi.hpp41
-rw-r--r--src/vk/texture.cpp23
3 files changed, 294 insertions, 16 deletions
diff --git a/src/vk/qoi.cpp b/src/vk/qoi.cpp
new file mode 100644
index 0000000..8b7ef9e
--- /dev/null
+++ b/src/vk/qoi.cpp
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2022-2023 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "qoi.hpp"
+
+#include <array>
+#include <fstream>
+
+namespace
+{
+
+const char MAGIC[]{"qoif"};
+const int HEADER_SIZE{14};
+const uint8_t PADDING[8]{0,0,0,0,0,0,0,1};
+const unsigned int PIXELS_MAX{400000000};
+
+const int OP_INDEX{0b00000000};
+const int OP_DIFF {0b01000000};
+const int OP_LUMA {0b10000000};
+const int OP_RUN {0b11000000};
+const int OP_RGB {0b11111110};
+const int OP_RGBA {0b11111111};
+
+const int MASK_2_BITS{0b11000000};
+
+struct RGBA
+{
+ uint8_t red, green, blue, alpha;
+
+ RGBA();
+ RGBA(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha);
+};
+
+RGBA::RGBA():
+ red{0},
+ green{0},
+ blue{0},
+ alpha{255}
+{
+}
+
+RGBA::RGBA(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha):
+ red{red},
+ green{green},
+ blue{blue},
+ alpha{alpha}
+{
+}
+
+struct Pixel
+{
+ union
+ {
+ RGBA colors;
+ uint32_t value;
+ };
+
+ Pixel();
+ Pixel(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha);
+};
+
+Pixel::Pixel():
+ colors{}
+{
+}
+
+Pixel::Pixel(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha):
+ colors(red, green, blue, alpha)
+{
+}
+
+inline int
+color_hash(const RGBA &colors)
+{
+ return colors.red*3 + colors.green*5 + colors.blue*7 + colors.alpha*11;
+}
+
+void
+read_chars(uint8_t *data, int &p, char *str, int size)
+{
+ for(int i{0}; i < size; i++) str[i] = (char)data[p++];
+}
+
+void
+read_ui8(uint8_t *data, int &p, uint8_t &num)
+{
+ num = data[p++];
+}
+
+void
+read_ui32(uint8_t *data, int &p, uint32_t &num)
+{
+ uint8_t b1{data[p++]}, b2{data[p++]}, b3{data[p++]}, b4{data[p++]};
+
+ num = b1 << 24 | b2 << 16 | b3 << 8 | b4;
+}
+
+}
+
+namespace VK::QOI
+{
+
+Image::Image(const char *file_path, uint8_t channels):
+ channels{channels}
+{
+ int data_p{0};
+ int data_size;
+ uint8_t *data;
+
+ if(this->channels != 0 && this->channels != 3 && this->channels != 4)
+ {
+ throw std::invalid_argument{"invalid number of channels"};
+ }
+
+ { // Read data from file.
+ std::ifstream file(file_path, std::ios::binary | std::ios::ate);
+ if(!file)
+ {
+ throw std::runtime_error{"failed to open QOI file"};
+ }
+
+ data_size = file.tellg();
+ if(data_size < HEADER_SIZE + (int)sizeof(PADDING))
+ {
+ throw std::runtime_error{"invalid QOI file"};
+ }
+
+ file.seekg(0);
+ data = new uint8_t[data_size];
+ file.read((char*)data, data_size);
+ }
+
+ read_chars(data, data_p, this->header.magic, 4);
+ read_ui32(data, data_p, this->header.width);
+ read_ui32(data, data_p, this->header.height);
+ read_ui8(data, data_p, this->header.channels);
+ read_ui8(data, data_p, this->header.colorspace);
+
+ if(this->header.width == 0 || this->header.height == 0 ||
+ this->header.channels < 3 || this->header.channels > 4 ||
+ this->header.colorspace > 1 ||
+ this->header.height >= PIXELS_MAX / this->header.width)
+ {
+ throw std::runtime_error{"QOI file have an invalid header"};
+ }
+
+ if(this->channels == 0) this->channels = this->header.channels;
+
+ uint32_t num_pixels{this->header.width * this->header.height};
+ this->pixels_len = num_pixels * this->channels;
+ this->pixels = new uint8_t[this->pixels_len];
+
+ std::array<Pixel, 64> index;
+ Pixel pixel{};
+ int chunks_len = data_size - (int)sizeof(PADDING);
+
+ /*
+ This algorithm is based on the original implementation that is in GitHub:
+ https://github.com/phoboslab/qoi
+
+ For information about the QOI image format, see: https://qoiformat.org/
+ */
+ int pixel_p{0};
+ int run{0};
+ for(uint32_t decoded_pixel{0}; decoded_pixel < num_pixels; decoded_pixel++)
+ {
+ if(run > 0)
+ {
+ run--;
+ }
+ else if(data_p < chunks_len)
+ {
+ uint8_t output;
+ int b1;
+ read_ui8(data, data_p, output);
+ b1 = output;
+
+ if (b1 == OP_RGB)
+ {
+ read_ui8(data, data_p, pixel.colors.red);
+ read_ui8(data, data_p, pixel.colors.green);
+ read_ui8(data, data_p, pixel.colors.blue);
+ }
+ else if (b1 == OP_RGBA)
+ {
+ read_ui8(data, data_p, pixel.colors.red);
+ read_ui8(data, data_p, pixel.colors.green);
+ read_ui8(data, data_p, pixel.colors.blue);
+ read_ui8(data, data_p, pixel.colors.alpha);
+ }
+ else if ((b1 & MASK_2_BITS) == OP_INDEX)
+ {
+ pixel = index[b1];
+ }
+ else if ((b1 & MASK_2_BITS) == OP_DIFF)
+ {
+ pixel.colors.red += ((b1 >> 4) & 0x03) - 2;
+ pixel.colors.green += ((b1 >> 2) & 0x03) - 2;
+ pixel.colors.blue += (b1 & 0x03) - 2;
+ }
+ else if ((b1 & MASK_2_BITS) == OP_LUMA)
+ {
+ int b2;
+ read_ui8(data, data_p, output);
+ b2 = output;
+ int vg = (b1 & 0x3f) - 32;
+ pixel.colors.red += vg - 8 + ((b2 >> 4) & 0x0f);
+ pixel.colors.green += vg;
+ pixel.colors.blue += vg - 8 + (b2 & 0x0f);
+ }
+ else if ((b1 & MASK_2_BITS) == OP_RUN)
+ {
+ run = (b1 & 0x3f);
+ }
+
+ index[color_hash(pixel.colors) % 64] = pixel;
+ }
+
+ this->pixels[pixel_p++] = pixel.colors.red;
+ this->pixels[pixel_p++] = pixel.colors.green;
+ this->pixels[pixel_p++] = pixel.colors.blue;
+ if(this->channels == 4) this->pixels[pixel_p++] = pixel.colors.alpha;
+ }
+
+ delete[] data;
+}
+
+Image::~Image()
+{
+ delete[] this->pixels;
+}
+
+}
diff --git a/src/vk/qoi.hpp b/src/vk/qoi.hpp
new file mode 100644
index 0000000..8a8688f
--- /dev/null
+++ b/src/vk/qoi.hpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2022-2023 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cstdint>
+
+namespace VK::QOI
+{
+ struct Header
+ {
+ char magic[4];
+ uint32_t width;
+ uint32_t height;
+ uint8_t channels;
+ uint8_t colorspace;
+ };
+
+ struct Image
+ {
+ Header header;
+ uint32_t pixels_len;
+ uint8_t channels;
+ uint8_t *pixels;
+
+ Image(const char *file_path, uint8_t channels);
+ ~Image();
+ };
+
+}
diff --git a/src/vk/texture.cpp b/src/vk/texture.cpp
index c699ecc..92ce5b5 100644
--- a/src/vk/texture.cpp
+++ b/src/vk/texture.cpp
@@ -16,12 +16,10 @@
#include "texture.hpp"
-#define QOI_IMPLEMENTATION 0
-#include <qoi.h>
-
#include "../command.hpp"
#include "../core.hpp"
#include "image.hpp"
+#include "qoi.hpp"
#include "source_buffer.hpp"
namespace
@@ -77,25 +75,21 @@ load_image(void *obj)
{
auto self = static_cast<ImageTextureBuilder*>(obj);
- qoi_desc img_desc;
const int num_channels = 4; // all images are converted to RGBA
- unsigned char *pixels;
+ VK::QOI::Image qoi_image(self->texture_path.c_str(), num_channels);
+ uint8_t *pixels;
{ // Load file image from file.
- void *pixels_ptr = qoi_read(self->texture_path.c_str(), &img_desc, 4);
- if(pixels_ptr == NULL) throw CommandError{"Failed to open image."};
-
- pixels = static_cast<unsigned char*>(pixels_ptr);
- self->texture->width = static_cast<uint32_t>(img_desc.width);
- self->texture->height = static_cast<uint32_t>(img_desc.height);
+ self->texture->width = qoi_image.header.width;
+ self->texture->height = qoi_image.header.height;
self->texture->mip_levels = 1;
- pixels = static_cast<unsigned char*>(pixels_ptr);
+ pixels = qoi_image.pixels;
}
// Load file image into a vulkan buffer.
size_t image_size{static_cast<size_t>(
- img_desc.width * img_desc.height * num_channels)};
+ qoi_image.header.width * qoi_image.header.height * num_channels)};
VK::SourceBuffer source_image_buffer{
cg_core.vk_device_with_swapchain, pixels, image_size};
@@ -155,9 +149,6 @@ load_image(void *obj)
VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT);
});
}
-
- // Free resources.
- QOI_FREE(pixels);
}
void
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-18 14:26:21 +0000