261 lines
5.7 KiB
C
261 lines
5.7 KiB
C
/*
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* Copyright (c) 1995 Argonaut Technologies Limited. All rights reserved.
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*
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* $Id: P_PI.C 1.2 1996/10/16 13:13:16 NIKH Exp $
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* $Locker: $
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*
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* Point renderers
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*/
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#include "drv.h"
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#include "shortcut.h"
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#include "blockops.h"
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static char rscid[] = "$Id: P_PI.C 1.2 1996/10/16 13:13:16 NIKH Exp $";
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#define ScalarsToRGB15(r,g,b) \
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(((b) >> 19) & 0x1f | ((g) >> 14) & 0x3e0 | ((r) >> 9) & 0x7c00)
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#define ScalarsToRGB16(r,g,b) \
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(((b) >> 19) & 0x1f | ((g) >> 13) & 0x7c0 | ((r) >> 8) & 0xf800)
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#define ScalarsToRGB24(r,g,b) \
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(((b) >> 16) & 0xff | ((g) >> 8) & 0xff00 | ((r) >> 8) & 0xff0000)
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/*
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* Fetch and clamp screen coordinates
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*/
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#define SETUP_POINT \
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x0 = BrFixedToInt(tvp->comp_x[C_SX]); \
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y0 = BrFixedToInt(tvp->comp_x[C_SY]); \
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CLAMP_LP(x0,y0);
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/*
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* Fetch details about texture
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*/
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#define SETUP_TEXTURE \
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width = work.texture.width_p; \
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height = work.texture.height; \
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stride = work.texture.stride_b;
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/*
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* Setup arbitrary width u and v
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*/
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#define SETUP_UV \
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pu = tvp->comp_x[C_U] % BrIntToFixed(width); \
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if (pu<0) \
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pu += BrIntToFixed(width); \
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pv = tvp->comp_x[C_V] % BrIntToFixed(height); \
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if (pv<0) \
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pv += BrIntToFixed(height);
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#if PARTS & PART_8
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void BR_ASM_CALL PointRenderPI(struct brp_block *block, union brp_vertex *tvp)
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{
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int o;
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int x0,y0;
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SETUP_POINT;
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o = y0*work.colour.stride_b+x0;
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((char *)work.colour.base)[o] = BrFixedToInt(tvp->comp_x[C_I]);
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}
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#endif
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#if PARTS & PART_8
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void BR_ASM_CALL PointRenderPITI(struct brp_block *block, union brp_vertex *tvp)
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{
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int o;
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int x0,y0;
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br_fixed_ls width,height,stride,pi,pu,pv;
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char texel;
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SETUP_POINT;
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SETUP_TEXTURE;
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pi = tvp->comp_x[C_I];
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SETUP_UV;
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o = y0*work.colour.stride_b+x0;
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texel = ((char *)work.texture.base)[(pv>>16)*stride+(pu>>16)];
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((char *)work.colour.base)[o] = work.shade_table[256*(pi>>16)+texel];
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}
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#endif
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#if PARTS & PART_8
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void BR_ASM_CALL PointRenderPIT(struct brp_block *block, union brp_vertex *tvp)
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{
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int o;
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int x0,y0;
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br_fixed_ls width,height,stride,pu,pv;
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char texel;
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SETUP_POINT;
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SETUP_TEXTURE;
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SETUP_UV;
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o = y0*work.colour.stride_b+x0;
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texel = ((char *)work.texture.base)[(pv>>16)*width+(pu>>16)];
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if (texel)
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((char *)work.colour.base)[o] = texel;
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}
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#endif
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typedef enum {
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LINE_RGB,LINE_TEXTURE
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} point_type;
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#if PARTS & PART_24
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void BR_ASM_CALL PointRenderPI_Generic_RGB_888(point_type mode,union brp_vertex *tvp)
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{
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int oc;
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int x0,y0;
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br_fixed_ls width,height,stride,pi,pu,pv,pr,pg,pb;
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char *texel;
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SETUP_POINT;
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if (mode==LINE_RGB) {
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pr = tvp->comp_x[C_R];
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pg = tvp->comp_x[C_G];
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pb = tvp->comp_x[C_B];
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}
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if (mode==LINE_TEXTURE) {
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/* Textured */
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SETUP_TEXTURE;
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SETUP_UV;
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}
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oc = y0*work.colour.stride_b+3*x0;
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if (mode==LINE_TEXTURE) {
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texel = ((char *)work.texture.base)+(pv>>16)*stride+3*(pu>>16);
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if (texel[0] || texel[1] || texel[2]) {
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((char *)work.colour.base)[oc] = texel[0];
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((char *)work.colour.base)[oc+1] = texel[1];
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((char *)work.colour.base)[oc+2] = texel[2];
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}
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} else {
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((char *)work.colour.base)[oc] = pb>>16;
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((char *)work.colour.base)[oc+1] = pg>>16;
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((char *)work.colour.base)[oc+2] = pr>>16;
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}
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}
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#endif
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#if PARTS & PART_24
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void BR_ASM_CALL PointRenderPI_RGB_888(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_888(LINE_RGB,tvp);
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}
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#endif
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#if PARTS & PART_24
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void BR_ASM_CALL PointRenderPIT_RGB_888(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_888(LINE_TEXTURE,tvp);
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}
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#endif
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#if PARTS & PART_15
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void BR_ASM_CALL PointRenderPI_Generic_RGB_555(point_type mode,union brp_vertex *tvp)
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{
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int oc;
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int x0,y0;
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br_fixed_ls width,height,stride,pi,pu,pv,pr,pg,pb;
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unsigned short texel;
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SETUP_POINT;
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if (mode==LINE_RGB) {
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pr = tvp->comp_x[C_R];
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pg = tvp->comp_x[C_G];
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pb = tvp->comp_x[C_B];
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}
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if (mode==LINE_TEXTURE) {
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/* Textured */
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SETUP_TEXTURE;
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SETUP_UV;
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}
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oc = y0*work.colour.stride_b+2*x0;
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if (mode==LINE_TEXTURE) {
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texel = *(unsigned short *)(((char *)work.texture.base)+(pv>>16)*stride+2*(pu>>16));
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if (texel)
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*(unsigned short *)(((char *)work.colour.base)+oc) = texel;
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} else {
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*(unsigned short *)(((char *)work.colour.base)+oc) = ScalarsToRGB15(pr,pg,pb);
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}
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}
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#endif
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#if PARTS & PART_15
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void BR_ASM_CALL PointRenderPI_RGB_555(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_555(LINE_RGB,tvp);
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}
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#endif
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#if PARTS & PART_15
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void BR_ASM_CALL PointRenderPIT_RGB_555(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_555(LINE_TEXTURE,tvp);
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}
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#endif
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#if PARTS & PART_16
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void BR_ASM_CALL PointRenderPI_Generic_RGB_565(point_type mode,union brp_vertex *tvp)
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{
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int oc;
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int x0,y0;
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br_fixed_ls width,height,stride,pi,pu,pv,pr,pg,pb;
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unsigned short texel;
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SETUP_POINT;
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if (mode==LINE_RGB) {
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pr = tvp->comp_x[C_R];
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pg = tvp->comp_x[C_G];
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pb = tvp->comp_x[C_B];
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}
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if (mode==LINE_TEXTURE) {
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/* Textured */
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SETUP_TEXTURE;
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SETUP_UV;
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}
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oc = y0*work.colour.stride_b+2*x0;
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if (mode==LINE_TEXTURE) {
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texel = *(unsigned short *)(((char *)work.texture.base)+(pv>>16)*stride+2*(pu>>16));
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if (texel)
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*(unsigned short *)(((char *)work.colour.base)+oc) = texel;
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} else {
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*(unsigned short *)(((char *)work.colour.base)+oc) = ScalarsToRGB16(pr,pg,pb);
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}
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}
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#endif
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#if PARTS & PART_16
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void BR_ASM_CALL PointRenderPI_RGB_565(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_565(LINE_RGB,tvp);
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}
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#endif
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#if PARTS & PART_16
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void BR_ASM_CALL PointRenderPIT_RGB_565(struct brp_block *block, union brp_vertex *tvp) {
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PointRenderPI_Generic_RGB_565(LINE_TEXTURE,tvp);
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}
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#endif
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