54 lines
1.1 KiB
ArmAsm
54 lines
1.1 KiB
ArmAsm
.global _gint_image_rgb16_clearbg
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.global _gint_image_rgb16_dye
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#include "image_macros.S"
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/* RGB16 CLEARBG and DYE, RAM version: trivial.
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This function handles both CLEARBG and DYE; in RGB16 they are the same,
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except that DYE writes not the pixel value (TMP) but a fixed color (SRC). As
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if often the case, the RAM speed is limiting, so there is no point in
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improving speed of the code on the CPU side. */
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.macro GEN_CLEARBG_DYE_LOOP HFLIP, OUT_DIR, TMP, SRC
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mov.w @r8+, r0 /* cmd.edge_2 (don't care) */
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mov.w @r8+, r9 /* cmd.color_1 (alpha color) */
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mov.w @r8+, r0 /* cmd.color_2 (dye color) */
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.if \HFLIP
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add #-2, r5
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mov r2, r8
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shll r8
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add r8, r5
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shll r8
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add r8, r6
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.endif
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1: mov r2, r8
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2: mov.w @r3+, \TMP
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cmp/eq \TMP, r9
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bt 3f
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mov.w \SRC, @r5
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3: dt r8
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bf.s 2b
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add #(\OUT_DIR/2), r5
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END
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EPILOGUE
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.endm
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_gint_image_rgb16_clearbg:
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tst #1, r0
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bf 9f
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GEN_CLEARBG_DYE_LOOP 0, 4, r0, r0
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9: GEN_CLEARBG_DYE_LOOP 1, -4, r0, r0
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_gint_image_rgb16_dye:
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tst #1, r0
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bf 9f
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GEN_CLEARBG_DYE_LOOP 0, 4, r7, r0
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9: GEN_CLEARBG_DYE_LOOP 1, -4, r7, r0
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