// license:BSD-3-Clause // copyright-holders:Ryan Holtz //============================================================ // // bgfxutil.cpp - BGFX renderer helper utils // //============================================================ // MAMEOS headers #include "bgfxutil.h" #include "copyutil.h" #include "emucore.h" #include "render.h" const bgfx::Memory* bgfx_util::mame_texture_data_to_bgfx_texture_data(bgfx::TextureFormat::Enum &dst_format, uint32_t src_format, int rowpixels, int width_margin, int height, const rgb_t *palette, void *base, uint16_t &out_pitch, int &width_div_factor, int &width_mul_factor) { bgfx::TextureInfo info; const bgfx::Memory *data = nullptr; uint8_t *adjusted_base = (uint8_t *)base; switch (src_format) { case PRIMFLAG_TEXFORMAT(TEXFORMAT_YUY16): dst_format = bgfx::TextureFormat::BGRA8; width_div_factor = 2; width_mul_factor = 1; out_pitch = rowpixels * 2; bgfx::calcTextureSize(info, rowpixels / width_div_factor, height, 1, false, false, 1, dst_format); if (width_margin) { adjusted_base -= width_margin * 2; } data = bgfx::copy(adjusted_base, info.storageSize); break; case PRIMFLAG_TEXFORMAT(TEXFORMAT_PALETTE16): dst_format = bgfx::TextureFormat::R8; width_div_factor = 1; width_mul_factor = 2; out_pitch = rowpixels * 2; bgfx::calcTextureSize(info, rowpixels * width_mul_factor, height, 1, false, false, 1, dst_format); if (width_margin) { adjusted_base -= width_margin * 2; } data = bgfx::copy(adjusted_base, info.storageSize); break; case PRIMFLAG_TEXFORMAT(TEXFORMAT_ARGB32): case PRIMFLAG_TEXFORMAT(TEXFORMAT_RGB32): dst_format = bgfx::TextureFormat::BGRA8; width_div_factor = 1; width_mul_factor = 1; out_pitch = rowpixels * 4; bgfx::calcTextureSize(info, rowpixels, height, 1, false, false, 1, dst_format); if (width_margin) { adjusted_base -= width_margin * 4; } data = bgfx::copy(adjusted_base, info.storageSize); break; } return data; } const bgfx::Memory* bgfx_util::mame_texture_data_to_bgra32(uint32_t src_format, int width, int height, int rowpixels, const rgb_t *palette, void *base) { const bgfx::Memory* mem = bgfx::alloc(rowpixels * height * 4); auto* dst = reinterpret_cast(mem->data); auto* src16 = reinterpret_cast(base); auto* src32 = reinterpret_cast(base); for (int y = 0; y < height; y++) { switch (src_format) { case PRIMFLAG_TEXFORMAT(TEXFORMAT_PALETTE16): copy_util::copyline_palette16_to_bgra(dst, src16, width, palette); src16 += rowpixels; break; case PRIMFLAG_TEXFORMAT(TEXFORMAT_YUY16): copy_util::copyline_yuy16_to_bgra(dst, src16, width, palette, 1); src16 += rowpixels; break; case PRIMFLAG_TEXFORMAT(TEXFORMAT_ARGB32): copy_util::copyline_argb32_to_bgra(dst, src32, width, palette); src32 += rowpixels; break; case PRIMFLAG_TEXFORMAT(TEXFORMAT_RGB32): copy_util::copyline_rgb32_to_bgra(dst, src32, width, palette); src32 += rowpixels; break; default: break; } dst += width; } return mem; } uint64_t bgfx_util::get_blend_state(uint32_t blend) { switch (blend) { case BLENDMODE_ALPHA: return BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA); case BLENDMODE_RGB_MULTIPLY: //return BGFX_STATE_BLEND_FUNC_SEPARATE(BGFX_STATE_BLEND_DST_COLOR, BGFX_STATE_BLEND_INV_SRC_COLOR, BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ZERO); return BGFX_STATE_BLEND_FUNC_SEPARATE(BGFX_STATE_BLEND_DST_COLOR, BGFX_STATE_BLEND_ZERO, BGFX_STATE_BLEND_DST_ALPHA, BGFX_STATE_BLEND_ZERO); case BLENDMODE_ADD: return BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_ONE); default: return 0L; } return 0L; } void bgfx_util::find_prescale_factor(uint16_t width, uint16_t height, uint16_t max_prescale_size, uint16_t &xprescale, uint16_t &yprescale) { while (xprescale > 1 && width * xprescale > max_prescale_size) { xprescale--; } while (yprescale > 1 && height * yprescale > max_prescale_size) { yprescale--; } }