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GRAPHICS: Add functions for getting and setting pixels in a surface

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This commit is contained in:
Cameron Cawley 2021-03-07 23:14:21 +00:00 committed by neuromancer
parent 71a741822b
commit 099b593943
2 changed files with 65 additions and 0 deletions
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23
graphics/managed_surface.h
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@ -174,6 +174,29 @@ public:
*/
DisposeAfterUse::Flag disposeAfterUse() const { return _disposeAfterUse; }
/**
* Return the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
*
* @return The value of the pixel.
*/
inline uint32 getPixel(int x, int y) const {
return _innerSurface.getPixel(x, y);
}
/**
* Set the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @param pixel The value of the pixel.
*/
inline void setPixel(int x, int y, uint32 pixel) {
return _innerSurface.setPixel(x, y, pixel);
}
/**
* Return a pointer to the pixel at the specified point.
*

42
graphics/surface.h
View File

@ -24,6 +24,7 @@
#define GRAPHICS_SURFACE_H
#include "common/scummsys.h"
#include "common/endian.h"
#include "common/list.h"
namespace Common {
@ -142,6 +143,47 @@ public:
return static_cast<byte *>(pixels) + y * pitch + x * format.bytesPerPixel;
}
/**
* Return the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
*
* @return The value of the pixel.
*/
inline uint32 getPixel(int x, int y) const {
assert(format.bytesPerPixel > 0 && format.bytesPerPixel <= 4);
if (format.bytesPerPixel == 1)
return *((const uint8 *)getBasePtr(x, y));
else if (format.bytesPerPixel == 2)
return *((const uint16 *)getBasePtr(x, y));
else if (format.bytesPerPixel == 3)
return READ_UINT24(getBasePtr(x, y));
else if (format.bytesPerPixel == 4)
return *((const uint32 *)getBasePtr(x, y));
else
return 0;
}
/**
* Set the pixel at the specified point.
*
* @param x The x coordinate of the pixel.
* @param y The y coordinate of the pixel.
* @param pixel The value of the pixel.
*/
inline void setPixel(int x, int y, int pixel) {
assert(format.bytesPerPixel > 0 && format.bytesPerPixel <= 4);
if (format.bytesPerPixel == 1)
*((uint8 *)getBasePtr(x, y)) = pixel;
else if (format.bytesPerPixel == 2)
*((uint16 *)getBasePtr(x, y)) = pixel;
else if (format.bytesPerPixel == 3)
WRITE_UINT24(getBasePtr(x, y), pixel);
else if (format.bytesPerPixel == 4)
*((uint32 *)getBasePtr(x, y)) = pixel;
}
/**
* Allocate memory for the pixel data of the surface.
*