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bitmap.cpp
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/*
* This file is part of EasyRPG Player.
*
* EasyRPG Player is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* EasyRPG Player is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with EasyRPG Player. If not, see <http://www.gnu.org/licenses/>.
*/
// Headers
#include <cmath>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <iostream>
#include <unordered_map>
#include "utils.h"
#include "cache.h"
#include "bitmap.h"
#include "filefinder.h"
#include "options.h"
#include <lcf/data.h>
#include "output.h"
#include "image_xyz.h"
#include "image_bmp.h"
#include "image_png.h"
#include "transform.h"
#include "font.h"
#include "output.h"
#include "util_macro.h"
#include "bitmap_hslrgb.h"
#include <iostream>
BitmapRef Bitmap::Create(int width, int height, const Color& color) {
BitmapRef surface = Bitmap::Create(width, height, true);
surface->Fill(color);
return surface;
}
BitmapRef Bitmap::Create(Filesystem_Stream::InputStream stream, bool transparent, uint32_t flags) {
BitmapRef bmp = std::make_shared<Bitmap>(std::move(stream), transparent, flags);
if (!bmp->pixels()) {
return BitmapRef();
}
return bmp;
}
BitmapRef Bitmap::Create(const uint8_t* data, unsigned bytes, bool transparent, uint32_t flags) {
BitmapRef bmp = std::make_shared<Bitmap>(data, bytes, transparent, flags);
if (!bmp->pixels()) {
return BitmapRef();
}
return bmp;
}
BitmapRef Bitmap::Create(Bitmap const& source, Rect const& src_rect, bool transparent) {
return std::make_shared<Bitmap>(source, src_rect, transparent);
}
BitmapRef Bitmap::Create(int width, int height, bool transparent, int /* bpp */) {
return std::make_shared<Bitmap>(width, height, transparent);
}
BitmapRef Bitmap::Create(void *pixels, int width, int height, int pitch, const DynamicFormat& format) {
return std::make_shared<Bitmap>(pixels, width, height, pitch, format);
}
Bitmap::Bitmap(int width, int height, bool transparent) {
format = (transparent ? pixel_format : opaque_pixel_format);
pixman_format = find_format(format);
Init(width, height, (void *) NULL);
}
Bitmap::Bitmap(void *pixels, int width, int height, int pitch, const DynamicFormat& _format) {
format = _format;
pixman_format = find_format(format);
Init(width, height, pixels, pitch, false);
}
Bitmap::Bitmap(Filesystem_Stream::InputStream stream, bool transparent, uint32_t flags) {
format = (transparent ? pixel_format : opaque_pixel_format);
pixman_format = find_format(format);
if (!stream) {
Output::Error("Couldn't read image file {}", stream.GetName());
return;
}
ImageOut image_out;
uint8_t data[4] = {};
size_t bytes = stream.read(reinterpret_cast<char*>(data), 4).gcount();
stream.seekg(0, std::ios::ios_base::beg);
bool img_okay = false;
if (bytes >= 4 && strncmp((char*)data, "XYZ1", 4) == 0) {
img_okay = ImageXYZ::Read(stream, transparent, image_out);
} else if (bytes > 2 && strncmp((char*)data, "BM", 2) == 0) {
img_okay = ImageBMP::Read(stream, transparent, image_out);
} else if (bytes >= 4 && strncmp((char*)(data + 1), "PNG", 3) == 0) {
img_okay = ImagePNG::Read(stream, transparent, image_out);
} else
Output::Warning("Unsupported image file {} (Magic: {:02X})", stream.GetName(), *reinterpret_cast<uint32_t*>(data));
if (!img_okay) {
free(image_out.pixels);
return;
}
Init(image_out.width, image_out.height, nullptr);
ConvertImage(image_out.width, image_out.height, image_out.pixels, transparent);
CheckPixels(flags);
original_bpp = image_out.bpp;
filename = ToString(stream.GetName());
}
Bitmap::Bitmap(const uint8_t* data, unsigned bytes, bool transparent, uint32_t flags) {
format = (transparent ? pixel_format : opaque_pixel_format);
pixman_format = find_format(format);
ImageOut image_out;
bool img_okay = false;
if (bytes > 4 && strncmp((char*) data, "XYZ1", 4) == 0)
img_okay = ImageXYZ::Read(data, bytes, transparent, image_out);
else if (bytes > 2 && strncmp((char*) data, "BM", 2) == 0)
img_okay = ImageBMP::Read(data, bytes, transparent, image_out);
else if (bytes > 4 && strncmp((char*)(data + 1), "PNG", 3) == 0)
img_okay = ImagePNG::Read((const void*) data, transparent, image_out);
else
Output::Warning("Unsupported image (Magic: {:02X})", bytes >= 4 ? *reinterpret_cast<const uint32_t*>(data) : 0);
if (!img_okay) {
free(image_out.pixels);
return;
}
Init(image_out.width, image_out.height, nullptr);
ConvertImage(image_out.width, image_out.height, image_out.pixels, transparent);
original_bpp = image_out.bpp;
CheckPixels(flags);
}
Bitmap::Bitmap(Bitmap const& source, Rect const& src_rect, bool transparent) {
format = (transparent ? pixel_format : opaque_pixel_format);
pixman_format = find_format(format);
Init(src_rect.width, src_rect.height, (void *) NULL);
Blit(0, 0, source, src_rect, Opacity::Opaque());
}
bool Bitmap::WritePNG(std::ostream& os) const {
size_t const width = GetWidth(), height = GetHeight();
size_t const stride = width * 4;
std::vector<uint32_t> data(width * height);
auto dst = PixmanImagePtr{pixman_image_create_bits(PIXMAN_b8g8r8, width, height, &data.front(), stride)};
pixman_image_composite32(PIXMAN_OP_SRC, bitmap.get(), NULL, dst.get(),
0, 0, 0, 0, 0, 0, width, height);
return ImagePNG::Write(os, width, height, &data.front());
}
size_t Bitmap::GetSize() const {
if (!bitmap) {
return 0;
}
return pitch() * height();
}
ImageOpacity Bitmap::ComputeImageOpacity() const {
bool all_opaque = true;
bool all_transp = true;
bool alpha_1bit = true;
auto* p = reinterpret_cast<const uint32_t*>(pixels());
const auto mask = pixel_format.rgba_to_uint32_t(0, 0, 0, 0xFF);
int n = GetSize() / sizeof(uint32_t);
for (int i = 0; i < n; ++i ) {
auto px = p[i] & mask;
bool transp = (px == 0);
bool opaque = (px == mask);
all_transp &= transp;
all_opaque &= opaque;
alpha_1bit &= (transp | opaque);
}
return
all_transp ? ImageOpacity::Transparent :
all_opaque ? ImageOpacity::Opaque :
alpha_1bit ? ImageOpacity::Alpha_1Bit :
ImageOpacity::Alpha_8Bit;
}
ImageOpacity Bitmap::ComputeImageOpacity(Rect rect) const {
bool all_opaque = true;
bool all_transp = true;
bool alpha_1bit = true;
const auto full_rect = GetRect();
rect = full_rect.GetSubRect(rect);
auto* p = reinterpret_cast<const uint32_t*>(pixels());
const int stride = pitch() / sizeof(uint32_t);
const auto mask = pixel_format.rgba_to_uint32_t(0, 0, 0, 0xFF);
int xend = (rect.x + rect.width);
int yend = (rect.y + rect.height);
for (int y = rect.y * stride; y < yend * stride; y += stride) {
for (int x = rect.x; x < xend; ++x) {
auto px = p[x + y] & mask;
bool transp = (px == 0);
bool opaque = (px == mask);
all_transp &= transp;
all_opaque &= opaque;
alpha_1bit &= (transp | opaque);
}
}
return
all_transp ? ImageOpacity::Transparent :
all_opaque ? ImageOpacity::Opaque :
alpha_1bit ? ImageOpacity::Alpha_1Bit :
ImageOpacity::Alpha_8Bit;
}
void Bitmap::CheckPixels(uint32_t flags) {
if (flags & Flag_System) {
DynamicFormat format(32,8,24,8,16,8,8,8,0,PF::Alpha);
uint32_t pixel;
Bitmap bmp(reinterpret_cast<void*>(&pixel), 1, 1, 4, format);
pixman_image_composite32(PIXMAN_OP_SRC, bitmap.get(), (pixman_image_t*) NULL, bmp.bitmap.get(),
0, 32, 0, 0, 0, 0, 1, 1);
bg_color = Color((int)(pixel>>24)&0xFF, (int)(pixel>>16)&0xFF, (int)(pixel>>8)&0xFF, (int)pixel&0xFF);
pixman_image_composite32(PIXMAN_OP_SRC, bitmap.get(), (pixman_image_t*) NULL, bmp.bitmap.get(),
16, 32, 0, 0, 0, 0, 1, 1);
sh_color = Color((int)(pixel>>24)&0xFF, (int)(pixel>>16)&0xFF, (int)(pixel>>8)&0xFF, (int)pixel&0xFF);
}
if (flags & Flag_Chipset) {
const int h = height() / TILE_SIZE;
const int w = width() / TILE_SIZE;
tile_opacity = TileOpacity(w, h);
for (int ty = 0; ty < h; ++ty) {
for (int tx = 0; tx < w; ++tx) {
Rect rect(tx * TILE_SIZE, ty * TILE_SIZE, TILE_SIZE, TILE_SIZE);
auto op = ComputeImageOpacity(rect);
tile_opacity.Set(tx, ty, op);
}
}
}
if (flags & Flag_ReadOnly) {
read_only = true;
image_opacity = ComputeImageOpacity();
}
}
Color Bitmap::GetColorAt(int x, int y) const {
if (x < 0 || x >= width() || y < 0 || y >= height()) {
return {};
}
Color color;
const uint8_t* pos = &reinterpret_cast<const uint8_t*>(pixels())[y * pitch() + x * bpp()];
uint32_t pixel = *reinterpret_cast<const uint32_t*>(pos);
format.uint32_to_rgba(pixel, color.red, color.green, color.blue, color.alpha);
return color;
}
void Bitmap::HueChangeBlit(int x, int y, Bitmap const& src, Rect const& src_rect_, double hue_) {
Rect dst_rect(x, y, 0, 0), src_rect = src_rect_;
if (!Rect::AdjustRectangles(src_rect, dst_rect, src.GetRect()))
return;
if (!Rect::AdjustRectangles(dst_rect, src_rect, GetRect()))
return;
int hue = (int) (hue_ / 60.0 * 0x100);
if (hue < 0)
hue += ((-hue + 0x5FF) / 0x600) * 0x600;
else if (hue > 0x600)
hue -= (hue / 0x600) * 0x600;
DynamicFormat format(32,8,24,8,16,8,8,8,0,PF::Alpha);
std::vector<uint32_t> pixels;
pixels.resize(src_rect.width * src_rect.height);
Bitmap bmp(reinterpret_cast<void*>(&pixels.front()), src_rect.width, src_rect.height, src_rect.width * 4, format);
bmp.Blit(0, 0, src, src_rect, Opacity::Opaque());
for (std::vector<uint32_t>::iterator p = pixels.begin(); p != pixels.end(); ++p) {
uint32_t pixel = *p;
uint8_t r = (pixel>>24) & 0xFF;
uint8_t g = (pixel>>16) & 0xFF;
uint8_t b = (pixel>> 8) & 0xFF;
uint8_t a = pixel & 0xFF;
if (a > 0)
RGB_adjust_HSL(r, g, b, hue);
*p = ((uint32_t) r << 24) | ((uint32_t) g << 16) | ((uint32_t) b << 8) | (uint32_t) a;
}
Blit(dst_rect.x, dst_rect.y, bmp, bmp.GetRect(), Opacity::Opaque());
}
Point Bitmap::TextDraw(Rect const& rect, int color, StringView text, Text::Alignment align) {
FontRef font = Font::Default();
switch (align) {
case Text::AlignLeft:
return TextDraw(rect.x, rect.y, color, text);
break;
case Text::AlignCenter: {
Rect text_rect = Text::GetSize(*font, text);
int dx = rect.x + (rect.width - text_rect.width) / 2;
return TextDraw(dx, rect.y, color, text);
break;
}
case Text::AlignRight: {
Rect text_rect = Text::GetSize(*font, text);
int dx = rect.x + rect.width - text_rect.width;
return TextDraw(dx, rect.y, color, text);
break;
}
default: assert(false);
}
return Point();
}
Point Bitmap::TextDraw(int x, int y, int color, StringView text, Text::Alignment align) {
auto font = Font::Default();
auto system = Cache::SystemOrBlack();
return Text::Draw(*this, x, y, *font, *system, color, text, align);
}
Point Bitmap::TextDraw(Rect const& rect, Color color, StringView text, Text::Alignment align) {
FontRef font = Font::Default();
switch (align) {
case Text::AlignLeft:
return TextDraw(rect.x, rect.y, color, text);
break;
case Text::AlignCenter: {
Rect text_rect = Text::GetSize(*font, text);
int dx = rect.x + (rect.width - text_rect.width) / 2;
return TextDraw(dx, rect.y, color, text);
break;
}
case Text::AlignRight: {
Rect text_rect = Text::GetSize(*font, text);
int dx = rect.x + rect.width - text_rect.width;
return TextDraw(dx, rect.y, color, text);
break;
}
default: assert(false);
}
return Point();
}
Point Bitmap::TextDraw(int x, int y, Color color, StringView text) {
auto font = Font::Default();
return Text::Draw(*this, x, y, *font, color, text);
}
Rect Bitmap::TransformRectangle(const Transform& xform, const Rect& rect) {
pixman_box16 bounds = {
static_cast<int16_t>(rect.x),
static_cast<int16_t>(rect.y),
static_cast<int16_t>(rect.x + rect.width),
static_cast<int16_t>(rect.y + rect.height)
};
pixman_transform_bounds(&xform.matrix, &bounds);
return Rect(bounds.x1, bounds.y1, bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
}
static constexpr std::array<std::pair<int,pixman_format_code_t>, 27> formats_map = {{
{ DynamicFormat(32,8,24,8,16,8,8,8,0,PF::Alpha).code_alpha(), PIXMAN_r8g8b8a8 },
{ DynamicFormat(32,8,24,8,16,8,8,8,0,PF::NoAlpha).code_alpha(), PIXMAN_r8g8b8x8 },
{ DynamicFormat(32,8,16,8,8,8,0,8,24,PF::Alpha).code_alpha(), PIXMAN_a8r8g8b8 },
{ DynamicFormat(32,8,16,8,8,8,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x8r8g8b8 },
{ DynamicFormat(32,8,0,8,8,8,16,8,24,PF::Alpha).code_alpha(), PIXMAN_a8b8g8r8 },
{ DynamicFormat(32,8,0,8,8,8,16,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x8b8g8r8 },
{ DynamicFormat(32,8,8,8,16,8,24,8,0,PF::Alpha).code_alpha(), PIXMAN_b8g8r8a8 },
{ DynamicFormat(32,8,8,8,16,8,24,0,0,PF::NoAlpha).code_alpha(), PIXMAN_b8g8r8x8 },
{ DynamicFormat(32,6,12,6,6,6,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x14r6g6b6 },
{ DynamicFormat(32,10,20,10,10,10,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x2r10g10b10 },
{ DynamicFormat(32,10,20,10,10,10,0,2,30,PF::Alpha).code_alpha(), PIXMAN_a2r10g10b10 },
{ DynamicFormat(32,10,0,10,10,10,20,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x2b10g10r10 },
{ DynamicFormat(32,10,0,10,10,10,20,2,30,PF::Alpha).code_alpha(), PIXMAN_a2b10g10r10 },
{ DynamicFormat(24,8,16,8,8,8,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_r8g8b8 },
{ DynamicFormat(24,8,0,8,8,8,16,0,0,PF::NoAlpha).code_alpha(), PIXMAN_b8g8r8 },
{ DynamicFormat(16,5,11,6,5,5,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_r5g6b5 },
{ DynamicFormat(16,5,0,6,5,5,11,0,0,PF::NoAlpha).code_alpha(), PIXMAN_b5g6r5 },
{ DynamicFormat(16,5,10,5,5,5,0,1,15,PF::Alpha).code_alpha(), PIXMAN_a1r5g5b5 },
{ DynamicFormat(16,5,10,5,5,5,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x1r5g5b5 },
{ DynamicFormat(16,5,0,5,5,5,10,1,15,PF::Alpha).code_alpha(), PIXMAN_a1b5g5r5 },
{ DynamicFormat(16,5,0,5,5,5,10,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x1b5g5r5 },
{ DynamicFormat(16,4,8,4,4,4,0,4,12,PF::Alpha).code_alpha(), PIXMAN_a4r4g4b4 },
{ DynamicFormat(16,4,8,4,4,4,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x4r4g4b4 },
{ DynamicFormat(16,4,0,4,4,4,8,4,12,PF::Alpha).code_alpha(), PIXMAN_a4b4g4r4 },
{ DynamicFormat(16,4,0,4,4,4,8,0,0,PF::NoAlpha).code_alpha(), PIXMAN_x4b4g4r4 },
{ DynamicFormat(8,8,0,8,0,8,0,8,0,PF::Alpha).code_alpha(), PIXMAN_g8 },
{ DynamicFormat(8,8,0,8,0,8,0,0,0,PF::NoAlpha).code_alpha(), PIXMAN_g8 }
}};
pixman_format_code_t Bitmap::find_format(const DynamicFormat& format) {
auto dcode = format.code_alpha();
auto iter = std::find_if(formats_map.begin(), formats_map.end(), [dcode](const auto& p) { return p.first == dcode; });
if (iter == formats_map.end()) {
// To fix add a pair to initialize_formats that maps the outputted
// DynamicFormat to a pixman format
Output::Error("{}\nDynamicFormat({}, {}, {}, {}, {}, {}, {}, {}, {}, {})",
"Couldn't find Pixman format for",
format.bits,
format.r.bits, format.r.shift,
format.g.bits, format.g.shift,
format.b.bits, format.b.shift,
format.a.bits, format.a.shift,
format.alpha_type == PF::Alpha ? "PF::Alpha" : "PF::NoAlpha");
}
return iter->second;
}
DynamicFormat Bitmap::pixel_format;
DynamicFormat Bitmap::opaque_pixel_format;
DynamicFormat Bitmap::image_format;
DynamicFormat Bitmap::opaque_image_format;
void Bitmap::SetFormat(const DynamicFormat& format) {
pixel_format = format;
opaque_pixel_format = format;
opaque_pixel_format.alpha_type = PF::NoAlpha;
image_format = format_R8G8B8A8_a().format();
opaque_image_format = format_R8G8B8A8_n().format();
}
DynamicFormat Bitmap::ChooseFormat(const DynamicFormat& format) {
uint32_t amask;
amask = (format.a.mask == 0)
? ((~0U >> (32 - format.bits)) ^ (format.r.mask | format.g.mask | format.b.mask))
: format.a.mask;
if (amask != 0)
return DynamicFormat(format.bits,
format.r.mask, format.g.mask, format.b.mask,
amask, PF::Alpha);
switch (format.bits) {
case 16:
return (format.r.shift > format.b.shift)
? DynamicFormat(16,5,10,5,5,5,0,1,15,PF::Alpha)
: DynamicFormat(16,5,0,5,5,5,10,1,15,PF::Alpha);
case 24:
return (format.r.shift > format.b.shift)
? DynamicFormat(32,8,16,8,8,8,0,8,24,PF::Alpha)
: DynamicFormat(32,8,0,8,8,8,16,8,24,PF::Alpha);
default:
return format_B8G8R8A8_a().format();
}
}
static void destroy_func(pixman_image_t * /* image */, void *data) {
free(data);
}
static pixman_indexed_t palette;
static bool palette_initialized = false;
static void initialize_palette() {
if (palette_initialized)
return;
palette.color = false;
palette.rgba[0] = 0U;
for (int i = 1; i < PIXMAN_MAX_INDEXED; i++)
palette.rgba[i] = ~0U;
palette_initialized = true;
}
void Bitmap::Init(int width, int height, void* data, int pitch, bool destroy) {
if (!pitch)
pitch = width * format.bytes;
bitmap.reset(pixman_image_create_bits(pixman_format, width, height, (uint32_t*) data, pitch));
if (bitmap == NULL) {
Output::Error("Couldn't create {}x{} image.", width, height);
}
if (format.bits == 8) {
initialize_palette();
pixman_image_set_indexed(bitmap.get(), &palette);
}
if (data != NULL && destroy)
pixman_image_set_destroy_function(bitmap.get(), destroy_func, data);
}
void Bitmap::ConvertImage(int& width, int& height, void*& pixels, bool transparent) {
const DynamicFormat& img_format = transparent ? image_format : opaque_image_format;
// premultiply alpha
for (int y = 0; y < height; y++) {
uint8_t* dst = (uint8_t*) pixels + y * width * 4;
for (int x = 0; x < width; x++) {
uint8_t &r = *dst++;
uint8_t &g = *dst++;
uint8_t &b = *dst++;
uint8_t &a = *dst++;
MultiplyAlpha(r, g, b, a);
}
}
Bitmap src(pixels, width, height, 0, img_format);
Clear();
BlitFast(0, 0, src, src.GetRect(), Opacity::Opaque());
free(pixels);
}
void* Bitmap::pixels() {
if (!bitmap) {
return nullptr;
}
return (void*) pixman_image_get_data(bitmap.get());
}
void const* Bitmap::pixels() const {
return (void const*) pixman_image_get_data(bitmap.get());
}
int Bitmap::bpp() const {
return (pixman_image_get_depth(bitmap.get()) + 7) / 8;
}
int Bitmap::width() const {
return pixman_image_get_width(bitmap.get());
}
int Bitmap::height() const {
return pixman_image_get_height(bitmap.get());
}
int Bitmap::pitch() const {
return pixman_image_get_stride(bitmap.get());
}
namespace {
PixmanImagePtr CreateMask(Opacity const& opacity, Rect const& src_rect, Transform const* pxform = nullptr) {
if (opacity.IsOpaque()) {
return nullptr;
}
if (!opacity.IsSplit()) {
pixman_color_t tcolor = {0, 0, 0, static_cast<uint16_t>(opacity.Value() << 8)};
return PixmanImagePtr{ pixman_image_create_solid_fill(&tcolor) };
}
auto mask = PixmanImagePtr{pixman_image_create_bits(PIXMAN_a8, 1, 2, (uint32_t*) NULL, 4)};
uint32_t* pixels = pixman_image_get_data(mask.get());
*reinterpret_cast<uint8_t*>(&pixels[0]) = (opacity.top & 0xFF);
*reinterpret_cast<uint8_t*>(&pixels[1]) = (opacity.bottom & 0xFF);
Transform xform = Transform::Scale(1.0 / src_rect.width, 1.0 / src_rect.height);
xform *= Transform::Translation(0, opacity.split);
if (pxform)
xform *= *pxform;
pixman_image_set_transform(mask.get(), &xform.matrix);
return mask;
}
} // anonymous namespace
void Bitmap::Blit(int x, int y, Bitmap const& src, Rect const& src_rect, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
if (opacity.IsTransparent()) {
return;
}
auto mask = CreateMask(opacity, src_rect);
pixman_image_composite32(src.GetOperator(mask.get(), blend_mode),
src.bitmap.get(),
mask.get(), bitmap.get(),
src_rect.x, src_rect.y,
0, 0,
x, y,
src_rect.width, src_rect.height);
}
void Bitmap::BlitFast(int x, int y, Bitmap const & src, Rect const & src_rect, Opacity const & opacity) {
if (opacity.IsTransparent()) {
return;
}
pixman_image_composite32(PIXMAN_OP_SRC,
src.bitmap.get(),
nullptr, bitmap.get(),
src_rect.x, src_rect.y,
0, 0,
x, y,
src_rect.width, src_rect.height);
}
PixmanImagePtr Bitmap::GetSubimage(Bitmap const& src, const Rect& src_rect) {
uint8_t* pixels = (uint8_t*) src.pixels() + src_rect.x * src.bpp() + src_rect.y * src.pitch();
return PixmanImagePtr{ pixman_image_create_bits(src.pixman_format, src_rect.width, src_rect.height,
(uint32_t*) pixels, src.pitch()) };
}
void Bitmap::TiledBlit(Rect const& src_rect, Bitmap const& src, Rect const& dst_rect, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
TiledBlit(0, 0, src_rect, src, dst_rect, opacity, blend_mode);
}
void Bitmap::TiledBlit(int ox, int oy, Rect const& src_rect, Bitmap const& src, Rect const& dst_rect, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
if (opacity.IsTransparent()) {
return;
}
if (ox >= src_rect.width) ox %= src_rect.width;
if (oy >= src_rect.height) oy %= src_rect.height;
if (ox < 0) ox += src_rect.width * ((-ox + src_rect.width - 1) / src_rect.width);
if (oy < 0) oy += src_rect.height * ((-oy + src_rect.height - 1) / src_rect.height);
auto src_bm = GetSubimage(src, src_rect);
pixman_image_set_repeat(src_bm.get(), PIXMAN_REPEAT_NORMAL);
auto mask = CreateMask(opacity, src_rect);
pixman_image_composite32(src.GetOperator(mask.get(), blend_mode),
src_bm.get(), mask.get(), bitmap.get(),
ox, oy,
0, 0,
dst_rect.x, dst_rect.y,
dst_rect.width, dst_rect.height);
}
void Bitmap::StretchBlit(Bitmap const& src, Rect const& src_rect, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
StretchBlit(GetRect(), src, src_rect, opacity, blend_mode);
}
void Bitmap::StretchBlit(Rect const& dst_rect, Bitmap const& src, Rect const& src_rect, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
if (opacity.IsTransparent()) {
return;
}
double zoom_x = (double)src_rect.width / dst_rect.width;
double zoom_y = (double)src_rect.height / dst_rect.height;
Transform xform = Transform::Scale(zoom_x, zoom_y);
pixman_image_set_transform(src.bitmap.get(), &xform.matrix);
auto mask = CreateMask(opacity, src_rect, &xform);
pixman_image_composite32(src.GetOperator(mask.get(), blend_mode),
src.bitmap.get(), mask.get(), bitmap.get(),
src_rect.x / zoom_x, src_rect.y / zoom_y,
0, 0,
dst_rect.x, dst_rect.y,
dst_rect.width, dst_rect.height);
pixman_image_set_transform(src.bitmap.get(), nullptr);
}
void Bitmap::WaverBlit(int x, int y, double zoom_x, double zoom_y, Bitmap const& src, Rect const& src_rect, int depth, double phase, Opacity const& opacity, Bitmap::BlendMode blend_mode) {
if (opacity.IsTransparent()) {
return;
}
Transform xform = Transform::Scale(1.0 / zoom_x, 1.0 / zoom_y);
pixman_image_set_transform(src.bitmap.get(), &xform.matrix);
auto mask = CreateMask(opacity, src_rect, &xform);
int height = static_cast<int>(std::floor(src_rect.height * zoom_y));
int width = static_cast<int>(std::floor(src_rect.width * zoom_x));
const auto xoff = src_rect.x * zoom_x;
const auto yoff = src_rect.y * zoom_y;
const auto yclip = y < 0 ? -y : 0;
const auto yend = std::min(height, this->height() - y);
for (int i = yclip; i < yend; i++) {
int dy = y + i;
// RPG_RT starts the effect from the top of the screen even if the image is clipped. The result
// is that moving images which cross the top of the screen can appear to go too fast or too slow
// in RPT_RT. The (i - yclip) is RPG_RT compatible behavior. Just (i) would be more correct.
const double sy = (i - yclip) * (2 * M_PI) / (32.0 * zoom_y);
const int offset = 2 * zoom_x * depth * std::sin(phase + sy);
pixman_image_composite32(src.GetOperator(mask.get(), blend_mode),
src.bitmap.get(), mask.get(), bitmap.get(),
xoff, yoff + i,
0, i,
x + offset, dy,
width, 1);
}
pixman_image_set_transform(src.bitmap.get(), nullptr);
}
static pixman_color_t PixmanColor(const Color &color) {
pixman_color_t pcolor;
pcolor.red = color.red * color.alpha;
pcolor.green = color.green * color.alpha;
pcolor.blue = color.blue * color.alpha;
pcolor.alpha = color.alpha << 8;
return pcolor;
}
void Bitmap::Fill(const Color &color) {
pixman_color_t pcolor = PixmanColor(color);
pixman_box32_t box = { 0, 0, width(), height() };
pixman_image_fill_boxes(PIXMAN_OP_SRC, bitmap.get(), &pcolor, 1, &box);
}
void Bitmap::FillRect(Rect const& dst_rect, const Color &color) {
pixman_color_t pcolor = PixmanColor(color);
auto timage = PixmanImagePtr{pixman_image_create_solid_fill(&pcolor)};
pixman_image_composite32(PIXMAN_OP_OVER,
timage.get(), nullptr, bitmap.get(),
0, 0,
0, 0,
dst_rect.x, dst_rect.y,
dst_rect.width, dst_rect.height);
}
void Bitmap::Clear() {
if (!pixels()) {
// Happens when height or width of bitmap are 0
return;
}
memset(pixels(), '\0', height() * pitch());
}
void Bitmap::ClearRect(Rect const& dst_rect) {
pixman_color_t pcolor = {};
pixman_box32_t box = {
dst_rect.x,
dst_rect.y,
dst_rect.x + dst_rect.width,
dst_rect.y + dst_rect.height
};
box.x2 = Utils::Clamp<int32_t>(box.x2, 0, width());
box.y2 = Utils::Clamp<int32_t>(box.y2, 0, height());
pixman_image_fill_boxes(PIXMAN_OP_CLEAR, bitmap.get(), &pcolor, 1, &box);
}
// Hard light lookup table mapping source color to destination color
// FIXME: Replace this with std::array<std::array<uint8_t,256>,256> when we have C++17
struct HardLightTable {
uint8_t table[256][256] = {};
};
static constexpr HardLightTable make_hard_light_lookup() {
HardLightTable hl;
for (int i = 0; i < 256; ++i) {
for (int j = 0; j < 256; ++j) {
int res = 0;
if (i <= 128)
res = (2 * i * j) / 255;
else
res = 255 - 2 * (255 - i) * (255 - j) / 255;
hl.table[i][j] = res > 255 ? 255 : res < 0 ? 0 : res;
}
}
return hl;
}
constexpr auto hard_light = make_hard_light_lookup();
// Saturation Tone Inline: Changes a pixel saturation
static inline void saturation_tone(uint32_t &src_pixel, const int saturation, const int rs, const int gs, const int bs, const int as) {
// Algorithm from OpenPDN (MIT license)
// Transformation in Y'CbCr color space
uint8_t r = (src_pixel >> rs) & 0xFF;
uint8_t g = (src_pixel >> gs) & 0xFF;
uint8_t b = (src_pixel >> bs) & 0xFF;
uint8_t a = (src_pixel >> as) & 0xFF;
// Y' = 0.299 R' + 0.587 G' + 0.114 B'
uint8_t lum = (7471 * b + 38470 * g + 19595 * r) >> 16;
// Scale Cb/Cr by scale factor "sat"
int red = ((lum * 1024 + (r - lum) * saturation) >> 10);
red = red > 255 ? 255 : red < 0 ? 0 : red;
int green = ((lum * 1024 + (g - lum) * saturation) >> 10);
green = green > 255 ? 255 : green < 0 ? 0 : green;
int blue = ((lum * 1024 + (b - lum) * saturation) >> 10);
blue = blue > 255 ? 255 : blue < 0 ? 0 : blue;
src_pixel = ((uint32_t)red << rs) | ((uint32_t)green << gs) | ((uint32_t)blue << bs) | ((uint32_t)a << as);
}
// Color Tone Inline: Changes color of a pixel by hard light table
static inline void color_tone(uint32_t &src_pixel, const Tone& tone, const int rs, const int gs, const int bs, const int as) {
src_pixel = ((uint32_t)hard_light.table[tone.red][(src_pixel >> rs) & 0xFF] << rs)
| ((uint32_t)hard_light.table[tone.green][(src_pixel >> gs) & 0xFF] << gs)
| ((uint32_t)hard_light.table[tone.blue][(src_pixel >> bs) & 0xFF] << bs)
| ((uint32_t)((src_pixel >> as) & 0xFF) << as);
}
static inline void color_tone_alpha(uint32_t &src_pixel, const Tone& tone, const int rs, const int gs, const int bs, const int as) {
uint8_t a = (src_pixel >> as) & 0xFF;
uint8_t r = ((uint32_t)hard_light.table[tone.red][(src_pixel >> rs) & 0xFF]) * a / 255;
uint8_t g = ((uint32_t)hard_light.table[tone.green][(src_pixel >> gs) & 0xFF]) * a / 255;
uint8_t b = ((uint32_t)hard_light.table[tone.blue][(src_pixel >> bs) & 0xFF]) * a / 255;
src_pixel = ((uint32_t)r << rs) | ((uint32_t)g << gs) | ((uint32_t)b << bs) | ((uint32_t)a << as);
}
void Bitmap::ToneBlit(int x, int y, Bitmap const& src, Rect const& src_rect, const Tone &tone, Opacity const& opacity) {
if (opacity.IsTransparent()) {
return;
}
// Optimisations based on Opacity:
// Transparent: Nothing to do
// Opaque: Alpha check can be skipped
// 1 Bit: Premultiplied Alpha can be skipped
// 8 Bit: No optimisations possible
auto src_opacity = src.GetImageOpacity();
if (src_opacity == ImageOpacity::Transparent) {
return;
}
if (tone == Tone(128,128,128,128)) {
if (&src != this) {
Blit(x, y, src, src_rect, opacity);
}
return;
}
// Only needed here, other codepaths are sanity checked by pixman
if (x < 0 || y < 0 || x >= width() || y >= height()) {
return;
}
if (&src != this) {
pixman_image_composite32(src.GetOperator(),
src.bitmap.get(), nullptr, bitmap.get(),
src_rect.x, src_rect.y,
0, 0,
x, y,
src_rect.width, src_rect.height);
}
const int as = pixel_format.a.shift;
const int rs = pixel_format.r.shift;
const int gs = pixel_format.g.shift;
const int bs = pixel_format.b.shift;
int next_row = pitch() / sizeof(uint32_t);
uint32_t* pixels = (uint32_t*)this->pixels();
pixels = pixels + (y - 1) * next_row + x;
const uint16_t limit_height = std::min<uint16_t>(src_rect.height, height());
const uint16_t limit_width = std::min<uint16_t>(src_rect.width, width());
const bool apply_sat = tone.gray != 128;
const bool apply_tone = (tone.red != 128 || tone.green != 128 || tone.blue != 128);
// If Saturation + Color:
if (apply_sat && apply_tone) {
int sat = tone.gray > 128 ? 1024 + (tone.gray - 128) * 16 : tone.gray * 8;
if (src_opacity == ImageOpacity::Opaque) {
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
saturation_tone(pixels[j], sat, rs, gs, bs, as);
color_tone(pixels[j], tone, rs, gs, bs, as);
}
}
} else if (src_opacity == ImageOpacity::Alpha_1Bit) {
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
uint8_t a = (uint8_t)((pixels[j] >> as) & 0xFF);
if (a == 0)
continue;
saturation_tone(pixels[j], sat, rs, gs, bs, as);
color_tone(pixels[j], tone, rs, gs, bs, as);
}
}
} else { // 8 Bit Alpha
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
uint8_t a = (uint8_t)((pixels[j] >> as) & 0xFF);
if (a == 0) {
continue;
}
saturation_tone(pixels[j], sat, rs, gs, bs, as);
color_tone_alpha(pixels[j], tone, rs, gs, bs, as);
}
}
}
}
// If Only Saturation:
else if (apply_sat) {
int sat = tone.gray > 128 ? 1024 + (tone.gray - 128) * 16 : tone.gray * 8;
if (src_opacity == ImageOpacity::Opaque) {
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
saturation_tone(pixels[j], sat, rs, gs, bs, as);
}
}
} else { // Any kind of alpha
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
uint8_t a = (uint8_t)((pixels[j] >> as) & 0xFF);
if (a == 0)
continue;
saturation_tone(pixels[j], sat, rs, gs, bs, as);
}
}
}
}
// If Only Color:
else if (apply_tone) {
if (src_opacity == ImageOpacity::Opaque) {
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
color_tone(pixels[j], tone, rs, gs, bs, as);
}
}
} else if (src_opacity == ImageOpacity::Alpha_1Bit) {
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
uint8_t a = (uint8_t)((pixels[j] >> as) & 0xFF);
if (a == 0)
continue;
color_tone(pixels[j], tone, rs, gs, bs, as);
}
}
} else { // 8 Bit Alpha
for (uint16_t i = 0; i < limit_height; ++i) {
pixels += next_row;
for (uint16_t j = 0; j < limit_width; ++j) {
uint8_t a = (uint8_t)((pixels[j] >> as) & 0xFF);
if (a == 0)
continue;
else if (a == 255) {
color_tone(pixels[j], tone, rs, gs, bs, as);
} else {
color_tone_alpha(pixels[j], tone, rs, gs, bs, as);