X-Git-Url: https://git.wh0rd.org/?p=ICEs.git;a=blobdiff_plain;f=394889%2Fs_triangle.i.8;fp=394889%2Fs_triangle.i.8;h=4febcad2f676e7ab365c85eb90394a1a19b4d6b0;hp=0000000000000000000000000000000000000000;hb=bd3239d2bbe0de3a200b266503e3330b1e391489;hpb=dbff64cb4b7530861c2309c794efdd4e0cf47a23

diff --git a/394889/s_triangle.i.8 b/394889/s_triangle.i.8
new file mode 100644
index 0000000..4febcad
--- /dev/null
+++ b/394889/s_triangle.i.8
@@ -0,0 +1,323 @@
+typedef union {
+	float f;
+	int i;
+} fi_type;
+static __inline__ 
+int IS_INF_OR_NAN(float x)
+{
+	fi_type tmp;
+	tmp.f = x;
+	return !(int)((unsigned int)((tmp.i & 0x7fffffff) - 0x7f800000) >> 31);
+}
+
+typedef enum {
+	MESA_FORMAT_RGBA8888, MESA_FORMAT_RGB888,
+} gl_format;
+typedef enum {
+	FRAG_ATTRIB_WPOS = 0, FRAG_ATTRIB_COL0 = 1, FRAG_ATTRIB_COL1 =
+	    2, FRAG_ATTRIB_FOGC = 3, FRAG_ATTRIB_TEX0 = 4, FRAG_ATTRIB_TEX1 =
+	    5, FRAG_ATTRIB_TEX2 = 6, FRAG_ATTRIB_TEX3 = 7, FRAG_ATTRIB_TEX4 =
+	    8, FRAG_ATTRIB_TEX5 = 9, FRAG_ATTRIB_TEX6 = 10, FRAG_ATTRIB_TEX7 =
+	    11, FRAG_ATTRIB_FACE = 12, FRAG_ATTRIB_PNTC = 13, FRAG_ATTRIB_VAR0 =
+	    14, FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + 16)
+} gl_frag_result;
+struct gl_config {
+	int depthBits;
+};
+struct gl_lightmodel {
+	unsigned int ColorControl;
+};
+struct gl_depthbuffer_attrib {
+	unsigned int Func;
+	unsigned char Mask;
+};
+struct gl_hint_attrib {
+	unsigned int PerspectiveCorrection;
+};
+struct gl_light_attrib {
+	struct gl_lightmodel Model;
+};
+struct gl_polygon_attrib {
+	unsigned char StippleFlag;
+};
+typedef enum {
+	TEXTURE_BUFFER_INDEX, TEXTURE_2D_ARRAY_INDEX, TEXTURE_1D_ARRAY_INDEX,
+	    TEXTURE_CUBE_INDEX, TEXTURE_3D_INDEX, TEXTURE_RECT_INDEX,
+	    TEXTURE_2D_INDEX, TEXTURE_1D_INDEX, NUM_TEXTURE_TARGETS
+} gl_texture_index;
+struct gl_texture_image {
+	unsigned int Border;
+	unsigned int Width;
+	unsigned int Height;
+	unsigned int WidthLog2;
+	unsigned char _IsPowerOfTwo;
+	unsigned int RowStride;
+	void *Data;
+};
+typedef enum {
+	MAX_FACES = 6
+} gl_face_index;
+struct gl_sampler_object {
+	unsigned int WrapS;
+	unsigned int WrapT;
+};
+struct gl_texture_object {
+	struct gl_sampler_object Sampler;
+	int BaseLevel;
+	unsigned int _Swizzle;
+	struct gl_texture_image *Image[MAX_FACES][15];
+};
+struct gl_texture_unit {
+	unsigned int _ReallyEnabled;
+	unsigned int EnvMode;
+	struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
+};
+struct gl_texture_attrib {
+	struct gl_texture_unit Unit[(16 + 16)];
+	unsigned int _EnabledUnits;
+	unsigned int _EnabledCoordUnits;
+};
+struct gl_fragment_program_state {
+	struct gl_fragment_program *_Current;
+};
+struct gl_ati_fragment_shader_state {
+	unsigned char _Enabled;
+};
+struct gl_renderbuffer {
+	void (*PutRowRGB) (struct gl_context * ctx, struct gl_renderbuffer * rb,
+			   unsigned int count, int x, int y, const void *values);
+};
+struct gl_framebuffer {
+	struct gl_config Visual;
+	struct gl_renderbuffer *_ColorDrawBuffers[8];
+};
+struct gl_context {
+	struct gl_framebuffer *DrawBuffer;
+	struct gl_depthbuffer_attrib Depth;
+	struct gl_hint_attrib Hint;
+	struct gl_light_attrib Light;
+	struct gl_polygon_attrib Polygon;
+	struct gl_texture_attrib Texture;
+	struct gl_fragment_program_state FragmentProgram;
+	struct gl_ati_fragment_shader_state ATIFragmentShader;
+	unsigned int RenderMode;
+};
+typedef struct {
+	float attrib[FRAG_ATTRIB_MAX][4];
+} SWvertex;
+typedef struct sw_span {
+	int x, y;
+	unsigned int end;
+	float attrStepX[FRAG_ATTRIB_MAX][4];
+	int intTex[2], intTexStep[2];
+} SWspan;
+typedef void (*swrast_tri_func) (struct gl_context * ctx, const SWvertex *,
+				 const SWvertex *, const SWvertex *);
+typedef struct {
+	unsigned int _RasterMask;
+	unsigned char _FogEnabled;
+	swrast_tri_func Triangle;
+} SWcontext;
+static void simple_textured_triangle(struct gl_context *ctx,
+				     const SWvertex * v0, const SWvertex * v1,
+				     const SWvertex * v2)
+{
+	typedef struct {
+		float dx;
+		float dy;
+		int fsx;
+		int fx0;
+		int lines;
+	} EdgeT;
+	EdgeT eMaj;
+	EdgeT eTop;
+	EdgeT eBot;
+	float oneOverArea;
+	const SWvertex *vMin;
+	const SWvertex *vMid;
+	const SWvertex *vMax;
+	const int snapMask = ~(((1 << 11) / (1 << 4)) - 1);
+	int vMin_fx;
+	int vMin_fy;
+	int vMid_fx;
+	int vMid_fy;
+	int vMax_fx;
+	int vMax_fy;
+	SWspan span;
+		const int fy0 =
+		    (((int)
+		      ((((v0->attrib[FRAG_ATTRIB_WPOS][1] -
+			  0.5F) * ((float)(1 << 11))) >=
+			0.0F) ? (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
+				  ((float)(1 << 11))) +
+				 0.5F)
+		       : (((v0->attrib[FRAG_ATTRIB_WPOS][1] -
+			    0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask;
+		const int fy1 =
+		    (((int)
+		      ((((v1->attrib[FRAG_ATTRIB_WPOS][1] -
+			  0.5F) * ((float)(1 << 11))) >=
+			0.0F) ? (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
+				  ((float)(1 << 11))) +
+				 0.5F)
+		       : (((v1->attrib[FRAG_ATTRIB_WPOS][1] -
+			    0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask;
+		const int fy2 =
+		    (((int)
+		      ((((v2->attrib[FRAG_ATTRIB_WPOS][1] -
+			  0.5F) * ((float)(1 << 11))) >=
+			0.0F) ? (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) *
+				  ((float)(1 << 11))) +
+				 0.5F)
+		       : (((v2->attrib[FRAG_ATTRIB_WPOS][1] -
+			    0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask;
+		if (fy0 <= fy1) {
+			if (fy1 <= fy2) {
+				vMin = v0;
+				vMax = v1;
+				vMin_fy = fy0;
+			}
+		}
+		vMin_fx =
+		    (((int)
+		      ((((vMin->attrib[FRAG_ATTRIB_WPOS][0] +
+			  0.5F) * ((float)(1 << 11))) >=
+			0.0F) ? (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
+				  ((float)(1 << 11))) +
+				 0.5F)
+		       : (((vMin->attrib[FRAG_ATTRIB_WPOS][0] +
+			    0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask;
+		vMid_fx =
+		    (((int)
+		      ((((vMid->attrib[FRAG_ATTRIB_WPOS][0] +
+			  0.5F) * ((float)(1 << 11))) >=
+			0.0F) ? (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) *
+				  ((float)(1 << 11))) +
+				 0.5F)
+		       : (((vMid->attrib[FRAG_ATTRIB_WPOS][0] +
+			    0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask;
+	eMaj.dx = ((vMax_fx - vMin_fx) * (1.0F / ((float)(1 << 11))));
+	eMaj.dy = ((vMax_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
+	eTop.dx = ((vMax_fx - vMid_fx) * (1.0F / ((float)(1 << 11))));
+	eBot.dy = ((vMid_fy - vMin_fy) * (1.0F / ((float)(1 << 11))));
+		const float area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
+		if (IS_INF_OR_NAN(area) || area == 0.0F)
+			return;
+		oneOverArea = 1.0F / area;
+		if (eBot.lines > 0) {
+			eBot.fx0 = vMin_fx;
+		}
+		int scan_from_left_to_right;
+		struct gl_renderbuffer *rb =
+		    ctx->DrawBuffer->_ColorDrawBuffers[0];
+		const struct gl_texture_object *obj =
+		    ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
+		const struct gl_texture_image *texImg =
+		    obj->Image[0][obj->BaseLevel];
+		const float twidth = (float) texImg->Width;
+		const int twidth_log2 = texImg->WidthLog2;
+		const unsigned char *texture = (const unsigned char *)texImg->Data;
+		const int smask = texImg->Width - 1;
+		const int tmask = texImg->Height - 1;
+		if (!rb || !texture) {
+			return;
+		}
+			float eMaj_ds =
+			    (vMax->attrib[FRAG_ATTRIB_TEX0][0] -
+			     vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
+			float eBot_ds =
+			    (vMid->attrib[FRAG_ATTRIB_TEX0][0] -
+			     vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth;
+			span.attrStepX[FRAG_ATTRIB_TEX0][0] =
+			    oneOverArea * (eMaj_ds * eBot.dy -
+					   eMaj.dy * eBot_ds);
+			span.intTexStep[0] =
+			    (((int)
+			      ((((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
+				 ((float)(1 << 11))) >=
+				0.0F) ? (((span.attrStepX[FRAG_ATTRIB_TEX0][0])
+					  * ((float)(1 << 11))) +
+					 0.5F)
+			       : (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) *
+				   ((float)(1 << 11))) - 0.5F))));
+			int subTriangle;
+			int fxLeftEdge = 0;
+			int fxRightEdge = 0;
+			int sLeft = 0;
+			for (subTriangle = 0; subTriangle <= 1; subTriangle++) {
+				EdgeT *eRight;
+				int lines;
+				if (subTriangle == 0) {
+					if (scan_from_left_to_right) {
+						eRight = &eBot;
+						lines = eRight->lines;
+					} else {
+						eRight = &eMaj;
+					}
+				} else {
+					if (scan_from_left_to_right) {
+						eRight = &eTop;
+					}
+					fxRightEdge = eRight->fsx - 1;
+				}
+				while (lines > 0) {
+					const int right=					 fxRightEdge >> 11;
+					span.x = fxLeftEdge >> 11;
+					if (right <= span.x)
+						span.end = 0;
+					else
+						span.end = right - span.x;
+					span.intTex[0] = sLeft;
+					if (span.end > 0 && span.y >= 0) {
+							unsigned int i;
+							unsigned char rgb[16384][3];
+							for (i = 0;
+							     i < span.end;
+							     i++) {
+								int s =
+								    ((span.
+								      intTex[0])
+								     >> 11) &
+								    smask;
+								int t =
+								    ((span.
+								      intTex[1])
+								     >> 11) &
+								    tmask;
+								int pos =
+								    (t <<
+								     twidth_log2)
+								    + s;
+								rgb[i][0] =
+								    texture[pos
+									    +
+									    2];
+								span.
+								    intTex[0] +=
+								    span.
+								    intTexStep
+								    [0];
+							}
+							rb->PutRowRGB(ctx, rb,
+								      span.end,
+								      span.x,
+								      span.y,
+								      rgb);
+						}
+					}
+			}
+}
+
+void _swrast_choose_triangle(struct gl_context *ctx)
+{
+	SWcontext *swrast = SWRAST_CONTEXT(ctx);
+			const struct gl_texture_object *texObj2D;
+			const struct gl_texture_image *texImg;
+			unsigned int minFilter;
+			unsigned int magFilter;
+			unsigned int envMode;
+			gl_format format;
+							swrast->Triangle =
+							    simple_textured_triangle;
+
+}