121 lines
1.9 KiB
C++
121 lines
1.9 KiB
C++
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// Pixmap.cpp
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// Implements the cPixmap class that represents a RGB pixmap and allows simple operations on it
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#include "Globals.h"
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#include "Pixmap.h"
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cPixmap::cPixmap(void) :
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m_Width(0),
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m_Height(0),
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m_Stride(0),
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m_Pixels(NULL)
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{
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}
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cPixmap::cPixmap(int a_Width, int a_Height) :
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m_Width(0),
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m_Height(0),
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m_Stride(0),
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m_Pixels(NULL)
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{
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SetSize(a_Width, a_Height);
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}
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cPixmap::~cPixmap()
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{
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delete m_Pixels;
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}
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void cPixmap::SetSize(int a_Width, int a_Height)
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{
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delete m_Pixels;
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m_Pixels = new int[a_Width * a_Height];
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m_Width = a_Width;
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m_Height = a_Height;
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m_Stride = m_Width; // Currently we don't need a special stride value, but let's support it for the future :)
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}
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void cPixmap::SetPixel(int a_X, int a_Y, int a_Color)
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{
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ASSERT(a_X >= 0);
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ASSERT(a_X < m_Width);
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ASSERT(a_Y >= 0);
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ASSERT(a_Y < m_Height);
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m_Pixels[a_X + a_Y * m_Stride] = a_Color;
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}
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int cPixmap::GetPixel(int a_X, int a_Y) const
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{
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ASSERT(a_X >= 0);
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ASSERT(a_X < m_Width);
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ASSERT(a_Y >= 0);
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ASSERT(a_Y < m_Height);
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return m_Pixels[a_X + a_Y * m_Stride];
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}
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void cPixmap::Fill(int a_Color)
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{
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int NumElements = m_Height * m_Stride;
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for (int i = 0; i < NumElements; i++)
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{
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m_Pixels[i] = a_Color;
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}
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}
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void cPixmap::DrawToDC(HDC a_DC, int a_OriginX, int a_OriginY)
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{
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BITMAPINFO bmi;
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bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
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bmi.bmiHeader.biWidth = m_Width;
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bmi.bmiHeader.biHeight = -m_Height; // Negative, we are top-down, unlike BMPs
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bmi.bmiHeader.biPlanes = 1;
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bmi.bmiHeader.biBitCount = 32;
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bmi.bmiHeader.biCompression = BI_RGB;
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bmi.bmiHeader.biSizeImage = m_Stride * m_Height * 4;
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bmi.bmiHeader.biXPelsPerMeter = 1440;
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bmi.bmiHeader.biYPelsPerMeter = 1440;
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bmi.bmiHeader.biClrUsed = 0;
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bmi.bmiHeader.biClrImportant = 0;
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SetDIBitsToDevice(a_DC, a_OriginX, a_OriginY, m_Width, m_Height, 0, 0, 0, m_Height, m_Pixels, &bmi, DIB_RGB_COLORS);
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}
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