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deps/g3dlite/source/Image3.cpp

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+/**
+  @file Image3.cpp
+
+  @maintainer Morgan McGuire, http://graphics.cs.williams.edu
+
+  @created 2007-01-31
+  @edited  2012-12-25
+*/
+
+
+#include "G3D/Image3.h"
+#include "G3D/Image3unorm8.h"
+#include "G3D/Image.h"
+#include "G3D/Color4.h"
+#include "G3D/Color4unorm8.h"
+#include "G3D/Color1.h"
+#include "G3D/Color1unorm8.h"
+#include "G3D/ImageFormat.h"
+#include "G3D/PixelTransferBuffer.h"
+#include "G3D/CPUPixelTransferBuffer.h"
+
+namespace G3D {
+
+Image3::Image3(int w, int h, WrapMode wrap) : Map2D<Color3, Color3>(w, h, wrap) {
+    setAll(Color3::black());
+}
+
+
+Image3::Ref Image3::fromImage3unorm8(const shared_ptr<Image3unorm8>& im) {
+    Ref out = createEmpty(im->wrapMode());
+    out->resize(im->width(), im->height());
+
+    int N = im->width() * im->height();
+    const Color3unorm8* src = reinterpret_cast<Color3unorm8*>(im->getCArray());
+    for (int i = 0; i < N; ++i) {
+        out->data[i] = Color3(src[i]);
+    }
+
+    return out;
+}
+
+
+Image3::Ref Image3::createEmpty(int width, int height, WrapMode wrap) {
+    return shared_ptr<Image3>(new Image3(width, height, wrap));
+}
+
+
+Image3::Ref Image3::createEmpty(WrapMode wrap) {
+    return createEmpty(0, 0, wrap);
+}
+
+
+Image3::Ref Image3::fromFile(const std::string& filename, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->load(filename);
+    return out;
+}
+
+
+void Image3::load(const std::string& filename) {
+    shared_ptr<Image> image = Image::fromFile(filename);
+    if (image->format() != ImageFormat::RGB32F()) {
+        image->convertToRGB8();
+    }
+
+    switch (image->format()->code)
+    {
+        case ImageFormat::CODE_L8:
+            copyArray(static_cast<const Color1unorm8*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        case ImageFormat::CODE_L32F:
+            copyArray(static_cast<const Color1*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        case ImageFormat::CODE_RGB8:
+            copyArray(static_cast<const Color3unorm8*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        case ImageFormat::CODE_RGB32F:
+            copyArray(static_cast<const Color3*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        case ImageFormat::CODE_RGBA8:
+            copyArray(static_cast<const Color4unorm8*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        case ImageFormat::CODE_RGBA32F:
+            copyArray(static_cast<const Color4*>(image->toPixelTransferBuffer()->buffer()), image->width(), image->height());
+            break;
+        default:
+            debugAssertM(false, "Trying to load unsupported image format");
+            break;
+    }
+
+    setChanged(true);
+}
+
+
+Image3::Ref Image3::fromArray(const class Color3unorm8* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+Image3::Ref Image3::fromArray(const class Color1* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+Image3::Ref Image3::fromArray(const class Color1unorm8* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+Image3::Ref Image3::fromArray(const class Color3* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+Image3::Ref Image3::fromArray(const class Color4unorm8* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+Image3::Ref Image3::fromArray(const class Color4* ptr, int w, int h, WrapMode wrap) {
+    Ref out = createEmpty(wrap);
+    out->copyArray(ptr, w, h);
+    return out;
+}
+
+
+void Image3::copyArray(const Color3unorm8* src, int w, int h) {
+    resize(w, h);
+
+    int N = w * h;
+    Color3* dst = data.getCArray();
+    // Convert int8 -> float
+    for (int i = 0; i < N; ++i) {
+        dst[i] = Color3(src[i]);
+    }
+}
+
+
+void Image3::copyArray(const Color4unorm8* src, int w, int h) {
+    resize(w, h);
+
+    int N = w * h;
+    Color3* dst = data.getCArray();
+    
+    // Strip alpha and convert
+    for (int i = 0; i < N; ++i) {
+        dst[i] = Color3(src[i].rgb());
+    }
+}
+
+
+void Image3::copyArray(const Color3* src, int w, int h) {
+    resize(w, h);
+    System::memcpy(getCArray(), src, w * h * sizeof(Color3));
+}
+
+
+void Image3::copyArray(const Color4* src, int w, int h) {
+    resize(w, h);
+
+    int N = w * h;
+    Color3* dst = data.getCArray();
+    
+    // Strip alpha
+    for (int i = 0; i < N; ++i) {
+        dst[i] = src[i].rgb();
+    }
+}
+
+
+void Image3::copyArray(const Color1unorm8* src, int w, int h) {
+    resize(w, h);
+    int N = w * h;
+
+    Color3* dst = getCArray();
+    for (int i = 0; i < N; ++i) {
+        dst[i].r = dst[i].g = dst[i].b = Color1(src[i]).value;
+    }
+}
+
+
+void Image3::copyArray(const Color1* src, int w, int h) {
+    resize(w, h);
+    int N = w * h;
+
+    Color3* dst = getCArray();
+    for (int i = 0; i < N; ++i) {
+        dst[i].r = dst[i].g = dst[i].b = src[i].value;
+    }
+}
+
+
+/** Saves in any of the formats supported by G3D::GImage. */
+void Image3::save(const std::string& filename) {
+    // To avoid saving as floating point image.  FreeImage cannot convert floating point to RGB8.
+    Image3unorm8::Ref unorm8 = Image3unorm8::fromImage3(dynamic_pointer_cast<Image3>(shared_from_this()));
+    unorm8->save(filename);
+}
+
+
+const ImageFormat* Image3::format() const {
+    return ImageFormat::RGB32F();
+}
+
+} // G3D