1

#include "../stdafx.h"

     2

#include "../gfx.h"

     3

#include "32bpp_base.hpp"

     4

     5

void *Blitter_32bppBase::MoveTo(const void *video, int x, int y)

     6

{

     7

	return (uint32 *)video + x + y * _screen.pitch;

     8

}

     9

    10

void Blitter_32bppBase::SetPixel(void *video, int x, int y, uint8 color)

    11

{

    12

	*((uint32 *)video + x + y * _screen.pitch) = LookupColourInPalette(color);

    13

}

    14

    15

void Blitter_32bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 color)

    16

{

    17

	uint32 *dst = (uint32 *)video + x + y * _screen.pitch;

    18

	if (*dst == 0) *dst = LookupColourInPalette(color);

    19

}

    20

    21

void Blitter_32bppBase::DrawRect(void *video, int width, int height, uint8 color)

    22

{

    23

	uint32 color32 = LookupColourInPalette(color);

    24

    25

	do {

    26

		uint32 *dst = (uint32 *)video;

    27

		for (int i = width; i > 0; i--) {

    28

			*dst = color32;

    29

			dst++;

    30

		}

    31

		video = (uint32 *)video + _screen.pitch;

    32

	} while (--height);

    33

}

    34

    35

void Blitter_32bppBase::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 color)

    36

{

    37

	int dy;

    38

	int dx;

    39

	int stepx;

    40

	int stepy;

    41

	int frac;

    42

    43

	dy = (y2 - y) * 2;

    44

	if (dy < 0) {

    45

		dy = -dy;

    46

		stepy = -1;

    47

	} else {

    48

		stepy = 1;

    49

	}

    50

    51

	dx = (x2 - x) * 2;

    52

	if (dx < 0) {

    53

		dx = -dx;

    54

		stepx = -1;

    55

	} else {

    56

		stepx = 1;

    57

	}

    58

    59

	if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);

    60

	if (dx > dy) {

    61

		frac = dy - (dx / 2);

    62

		while (x != x2) {

    63

			if (frac >= 0) {

    64

				y += stepy;

    65

				frac -= dx;

    66

			}

    67

			x += stepx;

    68

			frac += dy;

    69

			if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);

    70

		}

    71

	} else {

    72

		frac = dx - (dy / 2);

    73

		while (y != y2) {

    74

			if (frac >= 0) {

    75

				x += stepx;

    76

				frac -= dy;

    77

			}

    78

			y += stepy;

    79

			frac += dx;

    80

			if (x > 0 && y > 0 && x < screen_width && y < screen_height) this->SetPixel(video, x, y, color);

    81

		}

    82

	}

    83

}

    84

    85

void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height)

    86

{

    87

	uint32 *dst = (uint32 *)video;

    88

	uint32 *usrc = (uint32 *)src;

    89

    90

	for (; height > 0; height--) {

    91

		memcpy(dst, usrc, width * sizeof(uint32));

    92

		usrc += width;

    93

		dst += _screen.pitch;

    94

	}

    95

}

    96

    97

void Blitter_32bppBase::CopyToBuffer(const void *video, void *dst, int width, int height)

    98

{

    99

	uint32 *udst = (uint32 *)dst;

   100

	uint32 *src = (uint32 *)video;

   101

   102

	for (; height > 0; height--) {

   103

		memcpy(udst, src, width * sizeof(uint32));

   104

		src += _screen.pitch;

   105

		udst += width;

   106

	}

   107

}

   108

   109

void Blitter_32bppBase::CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)

   110

{

   111

	uint32 *udst = (uint32 *)dst;

   112

	uint32 *src = (uint32 *)video;

   113

   114

	for (; height > 0; height--) {

   115

		memcpy(udst, src, width * sizeof(uint32));

   116

		src += _screen.pitch;

   117

		udst += dst_pitch;

   118

	}

   119

}

   120

   121

void Blitter_32bppBase::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)

   122

{

   123

	const uint32 *src;

   124

	uint32 *dst;

   125

   126

	if (scroll_y > 0) {

   127

		/*Calculate pointers */

   128

		dst = (uint32 *)video + left + (top + height - 1) * _screen.pitch;

   129

		src = dst - scroll_y * _screen.pitch;

   130

   131

		/* Decrease height and increase top */

   132

		top += scroll_y;

   133

		height -= scroll_y;

   134

		assert(height > 0);

   135

   136

		/* Adjust left & width */

   137

		if (scroll_x >= 0) {

   138

			dst += scroll_x;

   139

			left += scroll_x;

   140

			width -= scroll_x;

   141

		} else {

   142

			src -= scroll_x;

   143

			width += scroll_x;

   144

		}

   145

   146

		for (int h = height; h > 0; h--) {

   147

			memcpy(dst, src, width * sizeof(uint32));

   148

			src -= _screen.pitch;

   149

			dst -= _screen.pitch;

   150

		}

   151

	} else {

   152

		/* Calculate pointers */

   153

		dst = (uint32 *)video + left + top * _screen.pitch;

   154

		src = dst - scroll_y * _screen.pitch;

   155

   156

		/* Decrese height. (scroll_y is <=0). */

   157

		height += scroll_y;

   158

		assert(height > 0);

   159

   160

		/* Adjust left & width */

   161

		if (scroll_x >= 0) {

   162

			dst += scroll_x;

   163

			left += scroll_x;

   164

			width -= scroll_x;

   165

		} else {

   166

			src -= scroll_x;

   167

			width += scroll_x;

   168

		}

   169

   170

		/* the y-displacement may be 0 therefore we have to use memmove,

   171

		 * because source and destination may overlap */

   172

		for (int h = height; h > 0; h--) {

   173

			memmove(dst, src, width * sizeof(uint32));

   174

			src += _screen.pitch;

   175

			dst += _screen.pitch;

   176

		}

   177

	}

   178

}

   179

   180

int Blitter_32bppBase::BufferSize(int width, int height)

   181

{

   182

	return width * height * sizeof(uint32);

   183

}

   184

   185

void Blitter_32bppBase::PaletteAnimate(uint start, uint count)

   186

{

   187

	/* By default, 32bpp doesn't have palette animation */

   188

}

   189

   190

Blitter::PaletteAnimation Blitter_32bppBase::UsePaletteAnimation()

   191

{

   192

	return Blitter::PALETTE_ANIMATION_NONE;

   193

}