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/* |
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* video_blit.cpp - Video/graphics emulation, blitters |
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* |
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* Basilisk II (C) 1997-2002 Christian Bauer |
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* Basilisk II (C) 1997-2004 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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// Initialize the framebuffer update function |
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// Returns FALSE, if the function was to be reduced to a simple memcpy() |
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// --> In that case, VOSF is not necessary |
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bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order, video_depth mac_depth) |
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bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order, int mac_depth) |
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{ |
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
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if (mac_depth == VDEPTH_1BIT) { |
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if (mac_depth == 1) { |
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// 1-bit mode uses a 1-bit X image, so there's no need for special blitting routines |
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Screen_blit = Blit_Copy_Raw; |
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// 2/4/8-bit mode on 8/16/32-bit screen? |
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if (visualFormat.depth == 8) { |
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if (mac_depth == VDEPTH_2BIT) { |
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if (mac_depth == 2) { |
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Screen_blit = Blit_Expand_2_To_8; |
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blitter_found = true; |
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} else if (mac_depth == VDEPTH_4BIT) { |
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} else if (mac_depth == 4) { |
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Screen_blit = Blit_Expand_4_To_8; |
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blitter_found = true; |
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} |
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} else if (visualFormat.depth == 15 || visualFormat.depth == 16) { |
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if (mac_depth == VDEPTH_2BIT) { |
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if (mac_depth == 2) { |
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Screen_blit = Blit_Expand_2_To_16; |
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blitter_found = true; |
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} else if (mac_depth == VDEPTH_4BIT) { |
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} else if (mac_depth == 4) { |
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Screen_blit = Blit_Expand_4_To_16; |
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blitter_found = true; |
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} else if (mac_depth == VDEPTH_8BIT) { |
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} else if (mac_depth == 8) { |
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Screen_blit = Blit_Expand_8_To_16; |
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blitter_found = true; |
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} |
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} else if (visualFormat.depth == 24 || visualFormat.depth == 32) { |
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if (mac_depth == VDEPTH_2BIT) { |
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if (mac_depth == 2) { |
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Screen_blit = Blit_Expand_2_To_32; |
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blitter_found = true; |
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} else if (mac_depth == VDEPTH_4BIT) { |
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} else if (mac_depth == 4) { |
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Screen_blit = Blit_Expand_4_To_32; |
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blitter_found = true; |
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} else if (mac_depth == VDEPTH_8BIT) { |
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} else if (mac_depth == 8) { |
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Screen_blit = Blit_Expand_8_To_32; |
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blitter_found = true; |
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} |
