mirror of https://github.com/ZDoom/gzdoom.git
136 lines
4.4 KiB
C++
136 lines
4.4 KiB
C++
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#include "i_system.h"
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#include "r_compiler/fixedfunction/drawercodegen.h"
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#include "r_compiler/ssa/ssa_function.h"
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#include "r_compiler/ssa/ssa_scope.h"
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#include "r_compiler/ssa/ssa_for_block.h"
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#include "r_compiler/ssa/ssa_if_block.h"
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#include "r_compiler/ssa/ssa_stack.h"
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#include "r_compiler/ssa/ssa_function.h"
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#include "r_compiler/ssa/ssa_struct_type.h"
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#include "r_compiler/ssa/ssa_value.h"
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SSAInt DrawerCodegen::calc_light_multiplier(SSAInt light)
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{
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return 256 - (light >> (FRACBITS - 8));
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}
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SSAVec4i DrawerCodegen::shade_pal_index_simple(SSAInt index, SSAInt light, SSAUBytePtr basecolors)
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{
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SSAVec4i color = basecolors[index * 4].load_vec4ub(); // = GPalette.BaseColors[index];
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return shade_bgra_simple(color, light);
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}
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SSAVec4i DrawerCodegen::shade_pal_index_advanced(SSAInt index, SSAInt light, const SSAShadeConstants &constants, SSAUBytePtr basecolors)
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{
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SSAVec4i color = basecolors[index * 4].load_vec4ub(); // = GPalette.BaseColors[index];
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return shade_bgra_advanced(color, light, constants);
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}
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SSAVec4i DrawerCodegen::shade_bgra_simple(SSAVec4i color, SSAInt light)
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{
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color = color * light / 256;
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return color.insert(3, 255);
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}
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SSAVec4i DrawerCodegen::shade_bgra_advanced(SSAVec4i color, SSAInt light, const SSAShadeConstants &constants)
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{
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SSAInt blue = color[0];
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SSAInt green = color[1];
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SSAInt red = color[2];
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SSAInt alpha = color[3];
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SSAInt intensity = ((red * 77 + green * 143 + blue * 37) >> 8) * constants.desaturate;
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SSAVec4i inv_light = 256 - light;
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SSAVec4i inv_desaturate = 256 - constants.desaturate;
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color = (color * inv_desaturate + intensity) / 256;
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color = (constants.fade * inv_light + color * light) / 256;
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color = (color * constants.light) / 256;
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return color.insert(3, alpha);
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}
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SSAVec4i DrawerCodegen::blend_copy(SSAVec4i fg)
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{
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return fg;
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}
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SSAVec4i DrawerCodegen::blend_add(SSAVec4i fg, SSAVec4i bg, SSAInt srcalpha, SSAInt destalpha)
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{
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SSAVec4i color = (fg * srcalpha + bg * destalpha) / 256;
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return color.insert(3, 255);
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}
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SSAVec4i DrawerCodegen::blend_sub(SSAVec4i fg, SSAVec4i bg, SSAInt srcalpha, SSAInt destalpha)
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{
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SSAVec4i color = (bg * destalpha - fg * srcalpha) / 256;
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return color.insert(3, 255);
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}
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SSAVec4i DrawerCodegen::blend_revsub(SSAVec4i fg, SSAVec4i bg, SSAInt srcalpha, SSAInt destalpha)
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{
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SSAVec4i color = (fg * srcalpha - bg * destalpha) / 256;
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return color.insert(3, 255);
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}
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SSAVec4i DrawerCodegen::blend_alpha_blend(SSAVec4i fg, SSAVec4i bg)
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{
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SSAInt alpha = fg[3];
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alpha = alpha + (alpha >> 7); // // 255 -> 256
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SSAInt inv_alpha = 256 - alpha;
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SSAVec4i color = (fg * alpha + bg * inv_alpha) / 256;
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return color.insert(3, 255);
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}
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SSAInt DrawerCodegen::calc_blend_bgalpha(SSAVec4i fg, SSAInt destalpha)
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{
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SSAInt alpha = fg[3];
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alpha = alpha + (alpha >> 7);
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SSAInt inv_alpha = 256 - alpha;
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return (destalpha * alpha + 256 * inv_alpha + 128) >> 8;
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}
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SSAVec4i DrawerCodegen::sample_linear(SSAUBytePtr col0, SSAUBytePtr col1, SSAInt texturefracx, SSAInt texturefracy, SSAInt one, SSAInt height)
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{
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SSAInt frac_y0 = (texturefracy >> FRACBITS) * height;
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SSAInt frac_y1 = ((texturefracy + one) >> FRACBITS) * height;
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SSAInt y0 = frac_y0 >> FRACBITS;
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SSAInt y1 = frac_y1 >> FRACBITS;
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SSAVec4i p00 = col0[y0 * 4].load_vec4ub();
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SSAVec4i p01 = col0[y1 * 4].load_vec4ub();
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SSAVec4i p10 = col1[y0 * 4].load_vec4ub();
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SSAVec4i p11 = col1[y1 * 4].load_vec4ub();
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SSAInt inv_b = texturefracx;
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SSAInt inv_a = (frac_y1 >> (FRACBITS - 4)) & 15;
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SSAInt a = 16 - inv_a;
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SSAInt b = 16 - inv_b;
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return (p00 * (a * b) + p01 * (inv_a * b) + p10 * (a * inv_b) + p11 * (inv_a * inv_b) + 127) >> 8;
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}
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SSAVec4i DrawerCodegen::sample_linear(SSAUBytePtr texture, SSAInt xfrac, SSAInt yfrac, SSAInt xbits, SSAInt ybits)
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{
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SSAInt xshift = (32 - xbits);
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SSAInt yshift = (32 - ybits);
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SSAInt xmask = (SSAInt(1) << xshift) - 1;
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SSAInt ymask = (SSAInt(1) << yshift) - 1;
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SSAInt x = xfrac >> xbits;
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SSAInt y = yfrac >> ybits;
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SSAVec4i p00 = texture[((y & ymask) + ((x & xmask) << yshift)) * 4].load_vec4ub();
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SSAVec4i p01 = texture[(((y + 1) & ymask) + ((x & xmask) << yshift)) * 4].load_vec4ub();
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SSAVec4i p10 = texture[((y & ymask) + (((x + 1) & xmask) << yshift)) * 4].load_vec4ub();
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SSAVec4i p11 = texture[(((y + 1) & ymask) + (((x + 1) & xmask) << yshift)) * 4].load_vec4ub();
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SSAInt inv_b = (xfrac >> (xbits - 4)) & 15;
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SSAInt inv_a = (yfrac >> (ybits - 4)) & 15;
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SSAInt a = 16 - inv_a;
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SSAInt b = 16 - inv_b;
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return (p00 * (a * b) + p01 * (inv_a * b) + p10 * (a * inv_b) + p11 * (inv_a * inv_b) + 127) >> 8;
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}
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