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Dreamcast: Fix not skipping completely invisible quads

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This commit is contained in:
UnknownShadow200 2024-07-07 09:26:12 +10:00
parent 2e4d7cd080
commit 9d322660e8
7 changed files with 103 additions and 160 deletions
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2
.github/workflows/build_dreamcast.yml vendored
View file

@ -23,7 +23,7 @@ jobs:
run: |
apt-get update
apt-get -y install genisoimage
wget https://github.com/ClassiCube/rpi-compiling-stuff/raw/main/cdi4dc -O /opt/toolchains/dc/kos/utils/cdi4dc
wget https://github.com/ClassiCube/rpi-compiling-stuff/raw/main/cdi4dc -O /opt/toolchains/dc/kos/utils/cdi4dc
chmod +x /opt/toolchains/dc/kos/utils/cdi4dc
export PATH=/opt/toolchains/dc/kos/utils/:$PATH
make dreamcast

49
misc/dreamcast/DrawColouredQuads.S
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@ -1,49 +0,0 @@
#include "VertexTransform.S"
.global _DrawColouredQuads
.align 4
.type _DrawColouredQuads,%function
_DrawColouredQuads:
! Setup
fldi0 fr1 ! U = 0
fldi0 fr2 ! V = 0
TransformSetup
!ViewportTransformSetup _VP_COL
.TRANSFORM_QUAD:
LoadColouredVertex
ProcessVertex1
LoadColouredVertex
ProcessVertex2
LoadColouredVertex
ProcessVertex3
LoadColouredVertex
ProcessVertex4
! CLIPFLAGS TESTING
cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
bt/s .NO_POINTS_VISIBLE ! if T goto NO_POINTS_VISIBLE
nop
bra .SOME_POINTS_VISIBLE
nop
.NO_POINTS_VISIBLE:
bra .LOOP_END ! jump to loop end after executing instruction in delay slot
add #-128, r5 ! r5 -= 4 * sizeof(VERTEX), move back to 1 vertex before start of quad
.SOME_POINTS_VISIBLE:
.LOOP_END:
dt r6 ! r6--; T = r6 == 0
bf .TRANSFORM_QUAD ! if !T then goto TRANSFORM_QUAD
nop
TransformEnd
.align 4
!.VP_COL:
! .long _vp

46
misc/dreamcast/DrawTexturedQuads.S
View file

@ -1,46 +0,0 @@
#include "VertexTransform.S"
.global _DrawTexturedQuads
.align 4
_DrawTexturedQuads:
! Setup
TransformSetup
!ViewportTransformSetup .VP_TEX
.TRANSFORM_QUAD:
LoadTexturedVertex
ProcessVertex1
LoadTexturedVertex
ProcessVertex2
LoadTexturedVertex
ProcessVertex3
LoadTexturedVertex
ProcessVertex4
! CLIPFLAGS TESTING
cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
bt/s .NO_POINTS_VISIBLE ! if T goto NO_POINTS_VISIBLE
nop
bra .SOME_POINTS_VISIBLE
nop
.NO_POINTS_VISIBLE:
bra .LOOP_END ! jump to loop end after executing instruction in delay slot
add #-128, r5 ! r5 -= 4 * sizeof(VERTEX), move back to prior quad, so that this invisible quad gets overwritten in next iteration
.SOME_POINTS_VISIBLE:
.LOOP_END:
dt r6 ! r6--; T = r6 == 0
bf .TRANSFORM_QUAD ! if !T then goto TRANSFORM_QUAD
nop
TransformEnd
.align 4
!.VP_TEX:
! .long _vp

129
misc/dreamcast/VertexTransform.S
View file

@ -192,55 +192,94 @@
! =========================================================
! ====================== VIEWPORT TRANSFORM ===============
! ==================== TEXTURED VERTEX TRANSFORM ==========
! =========================================================
!r2 = return addr
!r0 = temp
!r5 = dst pointer
.global _DrawTexturedQuads
.type _DrawTexturedQuads,%function
.align 4
!fr0 = temp
!fr4 = temp
!fr5 = temp
!fr5 = temp
!fr8 = VIEWPORT_HWIDTH
!fr9 = VIEWPORT_HHEIGHT
!fr10 = VIEWPORT_X_PLUS_HWIDTH
!fr11 = VIEWPORT_Y_PLUS_HHEIGHT
_DrawTexturedQuads:
! Setup
TransformSetup
.macro ViewportTransformSetup vp_addr
mov.l \vp_addr, r0 ! EX, r0 = &vp
fmov.s @r0+,fr8 ! LS, fr8 = vp->HWIDTH
fmov.s @r0+,fr9 ! LS, fr9 = vp->HHEIGHT
fmov.s @r0+,fr10 ! LS, fr10 = vp->X_PLUS_HWIDTH
fmov.s @r0+,fr11 ! LS, fr11 = vp->Y_PLUS_HHEIGHT
nop ! MT (align to even instructions boundary)
.endm
.T_TRANSFORM_QUAD:
LoadTexturedVertex
ProcessVertex1
.macro ViewportTransformVertex
! INVERSE W CALCULATION
add #28, r5 ! EX, r5 = &vertex->w
fmov.s @r5,fr0 ! LS, fr0 = vertex->w
fmul fr0,fr0 ! FE, fr0 = fr0 * fr0
add #-24, r5 ! EX, r5 = &vertex->x
fsrra fr0 ! FE, fr0 = 1 / sqrt(fr0) -> 1 / vertex->w
LoadTexturedVertex
ProcessVertex2
! TRANSFORM X
fmov.s @r5,fr4 ! LS, fr4 = vertex->x
fmov fr10,fr5 ! LS, fr5 = VIEWPORT_X_PLUS_HWIDTH
fmul fr8,fr4 ! FE, fr4 = VIEWPORT_HWIDTH * vertex->x
fmac fr0,fr4,fr5 ! FE, fr5 = fr0 * fr4 + fr5 -- (X * F * hwidth) + x_plus_hwidth
fmov.s fr5,@r5 ! LS, vertex->x = fr5
add #4, r5 ! EX, r5 = &vertex->y
LoadTexturedVertex
ProcessVertex3
! TRANSFORM Y
fmov.s @r5,fr4 ! LS, fr4 = vertex->y
fmov fr11,fr5 ! LS, fr5 = VIEWPORT_Y_PLUS_HHEIGHT
fmul fr9,fr4 ! FE, fr4 = VIEWPORT_HHEIGHT * vertex->y
fmac fr0,fr4,fr5 ! FE, fr5 = fr0 * fr4 + fr5 -- (Y * F * hheight) + y_plus_hheight
fmov.s fr5,@r5 ! LS, vertex->y = fr5
add #4, r5 ! EX, r5 = &vertex->z
LoadTexturedVertex
ProcessVertex4
! ASSIGN Z
fmov.s fr0,@r5 ! LS, vertex->z = fr0
add #20, r5 ! EX, r5 += 20 (points to start of next vertex)
.endm
! CLIPFLAGS TESTING
and #15,r0
cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
bt/s .T_NO_POINTS_VISIBLE ! if T goto NO_POINTS_VISIBLE
nop
bra .T_SOME_POINTS_VISIBLE
nop
.T_NO_POINTS_VISIBLE:
bra .T_LOOP_END ! jump to loop end after executing instruction in delay slot
add #-128, r5 ! r5 -= 4 * sizeof(VERTEX), move back to prior quad, so that this invisible quad gets overwritten in next iteration
.T_SOME_POINTS_VISIBLE:
.T_LOOP_END:
dt r6 ! r6--; T = r6 == 0
bf .T_TRANSFORM_QUAD ! if !T then goto T_TRANSFORM_QUAD
nop
TransformEnd
! =========================================================
! ==================== COLOURED VERTEX TRANSFORM ==========
! =========================================================
.global _DrawColouredQuads
.type _DrawColouredQuads,%function
.align 4
_DrawColouredQuads:
! Setup
fldi0 fr1 ! U = 0
fldi0 fr2 ! V = 0
TransformSetup
.C_TRANSFORM_QUAD:
LoadColouredVertex
ProcessVertex1
LoadColouredVertex
ProcessVertex2
LoadColouredVertex
ProcessVertex3
LoadColouredVertex
ProcessVertex4
! CLIPFLAGS TESTING
and #15,r0
cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
bt/s .C_NO_POINTS_VISIBLE ! if T goto NO_POINTS_VISIBLE
nop
bra .C_SOME_POINTS_VISIBLE
nop
.C_NO_POINTS_VISIBLE:
bra .C_LOOP_END ! jump to loop end after executing instruction in delay slot
add #-128, r5 ! r5 -= 4 * sizeof(VERTEX), move back to 1 vertex before start of quad
.C_SOME_POINTS_VISIBLE:
.C_LOOP_END:
dt r6 ! r6--; T = r6 == 0
bf .C_TRANSFORM_QUAD ! if !T then goto TRANSFORM_QUAD
nop
TransformEnd

3
src/Graphics_Dreamcast.c
View file

@ -627,7 +627,10 @@ void Gfx_ClearBuffers(GfxBuffers buffers) {
void Gfx_EndFrame(void) {
pvr_wait_ready();
pvr_scene_begin();
glKosSwapBuffers();
pvr_scene_finish();
}
void Gfx_OnWindowResize(void) {

17
third_party/gldc/src/gldc.h vendored
View file

@ -123,25 +123,8 @@ GLuint _glFreeTextureMemory(void);
GLuint _glUsedTextureMemory(void);
GLuint _glFreeContiguousTextureMemory(void);
void _glApplyScissor(int force);
extern GLboolean STATE_DIRTY;
void SceneListSubmit(Vertex* v2, int n, int type);
static inline int DimensionFlag(int w) {
switch(w) {
case 16: return 1;
case 32: return 2;
case 64: return 3;
case 128: return 4;
case 256: return 5;
case 512: return 6;
case 1024: return 7;
case 8:
default:
return 0;
}
}
#endif // PRIVATE_H

17
third_party/gldc/src/state.c vendored
View file

@ -41,7 +41,6 @@ void glKosInit() {
}
void glKosSwapBuffers() {
pvr_scene_begin();
if (OP_LIST.vector.size > 2) {
pvr_list_begin(PVR_LIST_OP_POLY);
SceneListSubmit((Vertex*)OP_LIST.vector.data, OP_LIST.vector.size, 0);
@ -62,7 +61,21 @@ void glKosSwapBuffers() {
pvr_list_finish();
TR_LIST.vector.size = 0;
}
pvr_scene_finish();
}
static inline int DimensionFlag(int w) {
switch(w) {
case 16: return 1;
case 32: return 2;
case 64: return 3;
case 128: return 4;
case 256: return 5;
case 512: return 6;
case 1024: return 7;
case 8:
default:
return 0;
}
}
void apply_poly_header(pvr_poly_hdr_t* dst, int list_type) {