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path: root/src/mesa/drivers/dri/unichrome/via_span.c
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/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "glheader.h"
#include "macros.h"
#include "mtypes.h"
#include "colormac.h"
#include "via_context.h"
#include "via_span.h"
#include "via_ioctl.h"
#include "swrast/swrast.h"

#define DBG 0

#define CLIPPIXEL(_x,_y) (_x >= minx && _x < maxx &&    \
                          _y >= miny && _y < maxy)


#define CLIPSPAN(_x, _y, _n, _x1, _n1, _i)                                  \
    if (_y < miny || _y >= maxy) {                                          \
        _n1 = 0, _x1 = x;                                                   \
    }                                                                       \
    else {                                                                  \
        _n1 = _n;                                                           \
        _x1 = _x;                                                           \
        if (_x1 < minx) _i += (minx -_x1), n1 -= (minx -_x1), _x1 = minx;   \
        if (_x1 + _n1 >= maxx) n1 -= (_x1 + n1 - maxx);                     \
   }

#define Y_FLIP(_y) (height - _y - 1)

#define HW_LOCK() 
#define HW_CLIPLOOP()							\
    do {								\
        __DRIdrawablePrivate *dPriv = vmesa->driDrawable;		\
        int _nc = dPriv->numClipRects;					\
        while (_nc--) {							\
		int minx = dPriv->pClipRects[_nc].x1 - dPriv->x;	\
        	int miny = dPriv->pClipRects[_nc].y1 - dPriv->y;	\
        	int maxx = dPriv->pClipRects[_nc].x2 - dPriv->x;	\
        	int maxy = dPriv->pClipRects[_nc].y2 - dPriv->y;


#define HW_ENDCLIPLOOP()                                            \
        }                                                           \
    } while (0)

#define HW_UNLOCK()

#undef LOCAL_VARS
#define LOCAL_VARS                                                   	\
    struct via_context *vmesa = VIA_CONTEXT(ctx);             		\
    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;                	\
    GLuint draw_pitch = vmesa->drawBuffer->pitch;                       \
    GLuint read_pitch = vmesa->readBuffer->pitch;                       \
    GLuint height = dPriv->h;                                        	\
    GLint p = 0;							\
    char *buf = (char *)(vmesa->drawBuffer->origMap + vmesa->drawXoff * vmesa->viaScreen->bytesPerPixel); \
    char *read_buf = (char *)(vmesa->readBuffer->origMap + vmesa->drawXoff * vmesa->viaScreen->bytesPerPixel); \
    (void) (read_pitch && draw_pitch && buf && read_buf && p);

/* ================================================================
 * Color buffer
 */

/* 16 bit, RGB565 color spanline and pixel functions
 */
#define GET_SRC_PTR(_x, _y) (read_buf + _x * 2 + _y * read_pitch)
#define GET_DST_PTR(_x, _y) (     buf + _x * 2 + _y * draw_pitch)
#define SPANTMP_PIXEL_FMT GL_RGB
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_SHORT_5_6_5

#define TAG(x)    via##x##_565
#define TAG2(x,y) via##x##_565##y
#include "spantmp2.h"


/* 32 bit, ARGB8888 color spanline and pixel functions
 */
#define GET_SRC_PTR(_x, _y) (read_buf + _x * 4 + _y * read_pitch)
#define GET_DST_PTR(_x, _y) (     buf + _x * 4 + _y * draw_pitch)
#define SPANTMP_PIXEL_FMT GL_BGRA
#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV

#define TAG(x)    via##x##_8888
#define TAG2(x,y) via##x##_8888##y
#include "spantmp2.h"


/* 16 bit depthbuffer functions.
 */
#define LOCAL_DEPTH_VARS                                \
    struct via_context *vmesa = VIA_CONTEXT(ctx);             \
    __DRIdrawablePrivate *dPriv = vmesa->driDrawable;   \
    GLuint depth_pitch = vmesa->depth.pitch;                  \
    GLuint height = dPriv->h;                           \
    char *buf = (char *)(vmesa->depth.map + (vmesa->drawXoff * vmesa->depth.bpp/8))

#define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS 


#define WRITE_DEPTH(_x, _y, d)                      \
    *(GLushort *)(buf + (_x) * 2 + (_y) * depth_pitch) = d;

#define READ_DEPTH(d, _x, _y)                       \
    d = *(volatile GLushort *)(buf + (_x) * 2 + (_y) * depth_pitch);

#define TAG(x) via##x##_16
#include "depthtmp.h"

/* 32 bit depthbuffer functions.
 */
#define WRITE_DEPTH(_x, _y, d)                      \
    *(GLuint *)(buf + (_x) * 4 + (_y) * depth_pitch) = d;

#define READ_DEPTH(d, _x, _y)                       \
    d = *(volatile GLuint *)(buf + (_x) * 4 + (_y) * depth_pitch);

#define TAG(x) via##x##_32
#include "depthtmp.h"



/* 24/8 bit interleaved depth/stencil functions
 */
#define WRITE_DEPTH( _x, _y, d ) {			\
   GLuint tmp = *(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch);	\
   tmp &= 0x000000ff;					\
   tmp |= ((d)<<8);				\
   *(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch) = tmp;		\
}

#define READ_DEPTH( d, _x, _y )		\
   d = (*(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch)) >> 8;


#define TAG(x) via##x##_24_8
#include "depthtmp.h"

#define WRITE_STENCIL( _x, _y, d ) {			\
   GLuint tmp = *(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch);	\
   tmp &= 0xffffff00;					\
   tmp |= (d);					\
   *(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch) = tmp;		\
}

#define READ_STENCIL( d, _x, _y )			\
   d = *(GLuint *)(buf + (_x)*4 + (_y)*depth_pitch) & 0xff;

#define TAG(x) via##x##_24_8
#include "stenciltmp.h"



static void viaSetBuffer(GLcontext *ctx, GLframebuffer *colorBuffer,
                      GLuint bufferBit)
{
    struct via_context *vmesa = VIA_CONTEXT(ctx);

    if (bufferBit == DD_FRONT_LEFT_BIT) {
	vmesa->drawBuffer = vmesa->readBuffer = &vmesa->front;
    }
    else if (bufferBit == DD_BACK_LEFT_BIT) {
	vmesa->drawBuffer = vmesa->readBuffer = &vmesa->back;
    }
    else {
        ASSERT(0);
    }
}

/* Move locking out to get reasonable span performance.
 */
void viaSpanRenderStart( GLcontext *ctx )
{
   struct via_context *vmesa = VIA_CONTEXT(ctx);     
   viaWaitIdle(vmesa);
   LOCK_HARDWARE(vmesa);
}

void viaSpanRenderFinish( GLcontext *ctx )
{
   struct via_context *vmesa = VIA_CONTEXT(ctx);
   _swrast_flush( ctx );
   UNLOCK_HARDWARE( vmesa );
}

void viaInitSpanFuncs(GLcontext *ctx)
{
    struct via_context *vmesa = VIA_CONTEXT(ctx);
    struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx);

    swdd->SetBuffer = viaSetBuffer;
    if (vmesa->viaScreen->bitsPerPixel == 16) {
	viaInitPointers_565( swdd );
    }
    else if (vmesa->viaScreen->bitsPerPixel == 32) {
	viaInitPointers_8888( swdd );
    }
    else {
	assert(0);
    }
	
    if (vmesa->glCtx->Visual.depthBits == 16) {
    	swdd->ReadDepthSpan = viaReadDepthSpan_16;
	swdd->WriteDepthSpan = viaWriteDepthSpan_16;
	swdd->WriteMonoDepthSpan = viaWriteMonoDepthSpan_16;
	swdd->ReadDepthPixels = viaReadDepthPixels_16;
	swdd->WriteDepthPixels = viaWriteDepthPixels_16;
    }	
    else if (vmesa->glCtx->Visual.depthBits == 24) {
        swdd->ReadDepthSpan = viaReadDepthSpan_24_8;
	swdd->WriteDepthSpan = viaWriteDepthSpan_24_8;
	swdd->WriteMonoDepthSpan = viaWriteMonoDepthSpan_24_8;
	swdd->ReadDepthPixels = viaReadDepthPixels_24_8;
	swdd->WriteDepthPixels = viaWriteDepthPixels_24_8;

	swdd->WriteStencilSpan = viaWriteStencilSpan_24_8;
	swdd->ReadStencilSpan = viaReadStencilSpan_24_8;
	swdd->WriteStencilPixels = viaWriteStencilPixels_24_8;
	swdd->ReadStencilPixels = viaReadStencilPixels_24_8;
    }
    else if (vmesa->glCtx->Visual.depthBits == 32) {
    	swdd->ReadDepthSpan = viaReadDepthSpan_32;
	swdd->WriteDepthSpan = viaWriteDepthSpan_32;
	swdd->WriteMonoDepthSpan = viaWriteMonoDepthSpan_32;
	swdd->ReadDepthPixels = viaReadDepthPixels_32;
	swdd->WriteDepthPixels = viaWriteDepthPixels_32;
    }

    swdd->SpanRenderStart = viaSpanRenderStart;
    swdd->SpanRenderFinish = viaSpanRenderFinish; 

    
    swdd->WriteCI8Span = NULL;
    swdd->WriteCI32Span = NULL;
    swdd->WriteMonoCISpan = NULL;
    swdd->WriteCI32Pixels = NULL;
    swdd->WriteMonoCIPixels = NULL;
    swdd->ReadCI32Span = NULL;
    swdd->ReadCI32Pixels = NULL;	
}