Bug Summary

File:var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/x86_64-unknown-linux-gnu/debug/build/swgl-63ae0a99caba1c8a/out/composite_FAST_PATH_TEXTURE_RECT.h
Warning:line 70, column 16
Value stored to 'texture_size' during its initialization is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name gl.cc -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -fapprox-func -funsafe-math-optimizations -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -mrecip=none -complex-range=limited -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/gfx/wr/swgl -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/gfx/wr/swgl -resource-dir /usr/lib/llvm-18/lib/clang/18 -include /var/lib/jenkins/workspace/firefox-scan-build/config/gcc_hidden.h -include /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/stl_wrappers -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D DEBUG=1 -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -D MOZILLA_CONFIG_H -I /var/lib/jenkins/workspace/firefox-scan-build/gfx/wr/swgl/../webrender/res -I src -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/x86_64-unknown-linux-gnu/debug/build/swgl-63ae0a99caba1c8a/out -U MOZILLA_CONFIG_H -D _GLIBCXX_USE_CXX11_ABI=0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -std=c++17 -fdeprecated-macro -ferror-limit 19 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fno-rtti -fgnuc-version=4.2.1 -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-07-30-004816-4182763-1 -x c++ src/gl.cc
1struct composite_FAST_PATH_TEXTURE_RECT_common {
2struct Samplers {
3 sampler2DRect_impl sColor0_impl;
4 int sColor0_slot;
5 bool set_slot(int index, int value) {
6 switch (index) {
7 case 2:
8 sColor0_slot = value;
9 return true;
10 }
11 return false;
12 }
13} samplers;
14struct AttribLocations {
15 int aPosition = NULL_ATTRIB16;
16 int aDeviceRect = NULL_ATTRIB16;
17 int aDeviceClipRect = NULL_ATTRIB16;
18 int aParams = NULL_ATTRIB16;
19 int aFlip = NULL_ATTRIB16;
20 int aUvRect0 = NULL_ATTRIB16;
21 void bind_loc(const char* name, int index) {
22 if (strcmp("aPosition", name) == 0) { aPosition = index; return; }
23 if (strcmp("aDeviceRect", name) == 0) { aDeviceRect = index; return; }
24 if (strcmp("aDeviceClipRect", name) == 0) { aDeviceClipRect = index; return; }
25 if (strcmp("aParams", name) == 0) { aParams = index; return; }
26 if (strcmp("aFlip", name) == 0) { aFlip = index; return; }
27 if (strcmp("aUvRect0", name) == 0) { aUvRect0 = index; return; }
28 }
29 int get_loc(const char* name) const {
30 if (strcmp("aPosition", name) == 0) { return aPosition != NULL_ATTRIB16 ? aPosition : -1; }
31 if (strcmp("aDeviceRect", name) == 0) { return aDeviceRect != NULL_ATTRIB16 ? aDeviceRect : -1; }
32 if (strcmp("aDeviceClipRect", name) == 0) { return aDeviceClipRect != NULL_ATTRIB16 ? aDeviceClipRect : -1; }
33 if (strcmp("aParams", name) == 0) { return aParams != NULL_ATTRIB16 ? aParams : -1; }
34 if (strcmp("aFlip", name) == 0) { return aFlip != NULL_ATTRIB16 ? aFlip : -1; }
35 if (strcmp("aUvRect0", name) == 0) { return aUvRect0 != NULL_ATTRIB16 ? aUvRect0 : -1; }
36 return -1;
37 }
38} attrib_locations;
39sampler2DRect sColor0;
40mat4_scalar uTransform;
41void bind_textures() {
42 sColor0 = lookup_sampler(&samplers.sColor0_impl, samplers.sColor0_slot);
43}
44};
45struct composite_FAST_PATH_TEXTURE_RECT_vert : VertexShaderImpl, composite_FAST_PATH_TEXTURE_RECT_common {
46private:
47typedef composite_FAST_PATH_TEXTURE_RECT_vert Self;
48// mat4_scalar uTransform;
49vec2 aPosition;
50// sampler2DRect sColor0;
51// sampler2DRect sColor1;
52// sampler2DRect sColor2;
53vec2 vUv;
54vec4_scalar aDeviceRect;
55vec4_scalar aDeviceClipRect;
56vec4_scalar aColor;
57vec4_scalar aParams;
58vec2_scalar aFlip;
59vec4_scalar aUvRect0;
60ALWAYS_INLINE__attribute__((always_inline)) inline void main(void) {
61 vec4_scalar device_rect = mix((aDeviceRect).sel(X,Y,Z,W), (aDeviceRect).sel(Z,W,X,Y), (aFlip).sel(X,Y,X,Y));
62 vec2 world_pos = mix((device_rect).sel(X,Y), (device_rect).sel(Z,W), (aPosition).sel(X,Y));
63 vec2 clipped_world_pos = clamp(world_pos, (aDeviceClipRect).sel(X,Y), (aDeviceClipRect).sel(Z,W));
64 vec2 uv = ((clipped_world_pos)-((device_rect).sel(X,Y)))/(((device_rect).sel(Z,W))-((device_rect).sel(X,Y)));
65 uv = mix((aUvRect0).sel(X,Y), (aUvRect0).sel(Z,W), uv);
66 vec4_scalar uvBounds = make_vec4(min((aUvRect0).sel(X,Y), (aUvRect0).sel(Z,W)), max((aUvRect0).sel(X,Y), (aUvRect0).sel(Z,W)));
67 int32_t rescale_uv = make_int((aParams).y);
68 if ((rescale_uv)==(1)) {
69 {
70 vec2_scalar texture_size = make_vec2(1.f, 1.f);
Value stored to 'texture_size' during its initialization is never read
71 uvBounds += make_vec4(0.5f, 0.5f, -(0.5f), -(0.5f));
72 }
73 }
74 vUv = uv;
75 gl_Position = (uTransform)*(make_vec4(clipped_world_pos, 0.f, 1.f));
76}
77static void set_uniform_1i(VertexShaderImpl* impl, int index, int value) {
78 Self* self = (Self*)impl;
79 if (self->samplers.set_slot(index, value)) return;
80 switch (index) {
81 case 2:
82 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
)); // sColor0
83 break;
84 case 1:
85 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
)); // uTransform
86 break;
87 }
88}
89static void set_uniform_4fv(VertexShaderImpl* impl, int index, const float *value) {
90 Self* self = (Self*)impl;
91 switch (index) {
92 case 2:
93 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
)); // sColor0
94 break;
95 case 1:
96 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
)); // uTransform
97 break;
98 }
99}
100static void set_uniform_matrix4fv(VertexShaderImpl* impl, int index, const float *value) {
101 Self* self = (Self*)impl;
102 switch (index) {
103 case 2:
104 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
)); // sColor0
105 break;
106 case 1:
107 self->uTransform = mat4_scalar::load_from_ptr(value);
108 break;
109 }
110}
111static void load_attribs(VertexShaderImpl* impl, VertexAttrib *attribs, uint32_t start, int instance, int count) {Self* self = (Self*)impl;
112 load_attrib(self->aPosition, attribs[self->attrib_locations.aPosition], start, instance, count);
113 load_flat_attrib(self->aDeviceRect, attribs[self->attrib_locations.aDeviceRect], start, instance, count);
114 load_flat_attrib(self->aDeviceClipRect, attribs[self->attrib_locations.aDeviceClipRect], start, instance, count);
115 load_flat_attrib(self->aParams, attribs[self->attrib_locations.aParams], start, instance, count);
116 load_flat_attrib(self->aFlip, attribs[self->attrib_locations.aFlip], start, instance, count);
117 load_flat_attrib(self->aUvRect0, attribs[self->attrib_locations.aUvRect0], start, instance, count);
118}
119public:
120struct InterpOutputs {
121vec2_scalar vUv;
122};
123private:
124ALWAYS_INLINE__attribute__((always_inline)) inline void store_interp_outputs(char* dest_ptr, size_t stride) {
125 for(int n = 0; n < 4; n++) {
126 auto* dest = reinterpret_cast<InterpOutputs*>(dest_ptr);
127 dest->vUv = get_nth(vUv, n);
128 dest_ptr += stride;
129 }
130}
131static void run(VertexShaderImpl* impl, char* interps, size_t interp_stride) {
132 Self* self = (Self*)impl;
133 self->main();
134 self->store_interp_outputs(interps, interp_stride);
135}
136static void init_batch(VertexShaderImpl* impl) {
137 Self* self = (Self*)impl; self->bind_textures(); }
138public:
139composite_FAST_PATH_TEXTURE_RECT_vert() {
140 set_uniform_1i_func = &set_uniform_1i;
141 set_uniform_4fv_func = &set_uniform_4fv;
142 set_uniform_matrix4fv_func = &set_uniform_matrix4fv;
143 init_batch_func = &init_batch;
144 load_attribs_func = &load_attribs;
145 run_primitive_func = &run;
146}
147};
148
149
150struct composite_FAST_PATH_TEXTURE_RECT_frag : FragmentShaderImpl, composite_FAST_PATH_TEXTURE_RECT_vert {
151private:
152typedef composite_FAST_PATH_TEXTURE_RECT_frag Self;
153#define oFragColorgl_FragColor gl_FragColor
154// vec4 oFragColor;
155// sampler2DRect sColor0;
156// sampler2DRect sColor1;
157// sampler2DRect sColor2;
158vec2 vUv;
159void write_output(vec4 color) {
160 oFragColorgl_FragColor = color;
161}
162ALWAYS_INLINE__attribute__((always_inline)) inline void main(void) {
163 vec2 uv = vUv;
164 vec4 texel = texture(sColor0, (uv).sel(X,Y));
165 vec4 color = texel;
166 write_output(color);
167}
168void swgl_drawSpanRGBA8() {
169 vec4_scalar color = make_vec4(1.f);
170 vec4_scalar uvBounds = make_vec4(make_vec2(0.f), make_vec2(textureSize(sColor0)));
171 if ((color)!=(make_vec4(1.f))) {
172 {
173 swgl_commitTextureColorRGBA8(sColor0, vUv, uvBounds, color)do { if (sColor0->filter == TextureFilter::LINEAR) { do { auto
packed_color = packColor(swgl_OutRGBA8, color); int len = (swgl_SpanLength
); int drawn = 0; if (LinearFilter filter = needsTextureLinear
(sColor0, vUv, len)) { if (blend_key) { drawn = blendTextureLinear
<true>(sColor0, vUv, len, uvBounds, packed_color, swgl_OutRGBA8
, filter); } else { drawn = blendTextureLinear<false>(sColor0
, vUv, len, uvBounds, packed_color, swgl_OutRGBA8, filter); }
} else if (blend_key) { drawn = blendTextureNearestFast<true
>(sColor0, vUv, len, uvBounds, packed_color, swgl_OutRGBA8
); } else { drawn = blendTextureNearestFast<false>(sColor0
, vUv, len, uvBounds, packed_color, swgl_OutRGBA8); } swgl_OutRGBA8
+= drawn; swgl_SpanLength -= drawn; } while (0); } else { do
{ auto packed_color = packColor(swgl_OutRGBA8, color); int drawn
= 0; if (needsNearestFallback(sColor0, vUv, swgl_SpanLength)
) { if (blend_key) { drawn = blendTextureNearestRepeat<true
, false>( sColor0, vUv, swgl_SpanLength, 0.0f, uvBounds, packed_color
, swgl_OutRGBA8); } else { drawn = blendTextureNearestRepeat<
false, false>( sColor0, vUv, swgl_SpanLength, 0.0f, uvBounds
, packed_color, swgl_OutRGBA8); } } else if (blend_key) { drawn
= blendTextureNearestFast<true>(sColor0, vUv, swgl_SpanLength
, uvBounds, packed_color, swgl_OutRGBA8); } else { drawn = blendTextureNearestFast
<false>(sColor0, vUv, swgl_SpanLength, uvBounds, packed_color
, swgl_OutRGBA8); } swgl_OutRGBA8 += drawn; swgl_SpanLength -=
drawn; } while (0); } } while (0);
174 }
175 } else {
176 swgl_commitTextureRGBA8(sColor0, vUv, uvBounds)do { if (sColor0->filter == TextureFilter::LINEAR) { do { auto
packed_color = packColor(swgl_OutRGBA8, NoColor()); int len =
(swgl_SpanLength); int drawn = 0; if (LinearFilter filter = needsTextureLinear
(sColor0, vUv, len)) { if (blend_key) { drawn = blendTextureLinear
<true>(sColor0, vUv, len, uvBounds, packed_color, swgl_OutRGBA8
, filter); } else { drawn = blendTextureLinear<false>(sColor0
, vUv, len, uvBounds, packed_color, swgl_OutRGBA8, filter); }
} else if (blend_key) { drawn = blendTextureNearestFast<true
>(sColor0, vUv, len, uvBounds, packed_color, swgl_OutRGBA8
); } else { drawn = blendTextureNearestFast<false>(sColor0
, vUv, len, uvBounds, packed_color, swgl_OutRGBA8); } swgl_OutRGBA8
+= drawn; swgl_SpanLength -= drawn; } while (0); } else { do
{ auto packed_color = packColor(swgl_OutRGBA8, NoColor()); int
drawn = 0; if (needsNearestFallback(sColor0, vUv, swgl_SpanLength
)) { if (blend_key) { drawn = blendTextureNearestRepeat<true
, false>( sColor0, vUv, swgl_SpanLength, 0.0f, uvBounds, packed_color
, swgl_OutRGBA8); } else { drawn = blendTextureNearestRepeat<
false, false>( sColor0, vUv, swgl_SpanLength, 0.0f, uvBounds
, packed_color, swgl_OutRGBA8); } } else if (blend_key) { drawn
= blendTextureNearestFast<true>(sColor0, vUv, swgl_SpanLength
, uvBounds, packed_color, swgl_OutRGBA8); } else { drawn = blendTextureNearestFast
<false>(sColor0, vUv, swgl_SpanLength, uvBounds, packed_color
, swgl_OutRGBA8); } swgl_OutRGBA8 += drawn; swgl_SpanLength -=
drawn; } while (0); } } while (0);
177 }
178}
179typedef composite_FAST_PATH_TEXTURE_RECT_vert::InterpOutputs InterpInputs;
180InterpInputs interp_step;
181struct InterpPerspective {
182vec2 vUv;
183};
184InterpPerspective interp_perspective;
185static void read_interp_inputs(FragmentShaderImpl* impl, const void* init_, const void* step_) {Self* self = (Self*)impl;const InterpInputs* init = (const InterpInputs*)init_;const InterpInputs* step = (const InterpInputs*)step_;
186 self->vUv = init_interp(init->vUv, step->vUv);
187 self->interp_step.vUv = step->vUv * 4.0f;
188}
189static void read_perspective_inputs(FragmentShaderImpl* impl, const void* init_, const void* step_) {Self* self = (Self*)impl;const InterpInputs* init = (const InterpInputs*)init_;const InterpInputs* step = (const InterpInputs*)step_;
190 Float w = 1.0f / self->gl_FragCoord.w;
191 self->interp_perspective.vUv = init_interp(init->vUv, step->vUv);
192 self->vUv = self->interp_perspective.vUv * w;
193 self->interp_step.vUv = step->vUv * 4.0f;
194}
195ALWAYS_INLINE__attribute__((always_inline)) inline void step_interp_inputs(int steps = 4) {
196 float chunks = steps * 0.25f;
197 vUv += interp_step.vUv * chunks;
198}
199ALWAYS_INLINE__attribute__((always_inline)) inline void step_perspective_inputs(int steps = 4) {
200 step_perspective(steps);
201 float chunks = steps * 0.25f;
202 Float w = 1.0f / gl_FragCoord.w;
203 interp_perspective.vUv += interp_step.vUv * chunks;
204 vUv = w * interp_perspective.vUv;
205}
206static void run(FragmentShaderImpl* impl) {
207 Self* self = (Self*)impl;
208 self->main();
209 self->step_interp_inputs();
210}
211static void skip(FragmentShaderImpl* impl, int steps) {
212 Self* self = (Self*)impl;
213 self->step_interp_inputs(steps);
214}
215static void run_perspective(FragmentShaderImpl* impl) {
216 Self* self = (Self*)impl;
217 self->main();
218 self->step_perspective_inputs();
219}
220static void skip_perspective(FragmentShaderImpl* impl, int steps) {
221 Self* self = (Self*)impl;
222 self->step_perspective_inputs(steps);
223}
224static int draw_span_RGBA8(FragmentShaderImpl* impl) {
225 Self* self = (Self*)impl; DISPATCH_DRAW_SPAN(self, RGBA8)do { int total = self->swgl_SpanLength; self->swgl_drawSpanRGBA8
(); int drawn = total - self->swgl_SpanLength; if (drawn) self
->step_interp_inputs(drawn); return drawn; } while (0); }
226public:
227composite_FAST_PATH_TEXTURE_RECT_frag() {
228 init_span_func = &read_interp_inputs;
229 run_func = &run;
230 skip_func = &skip;
231 draw_span_RGBA8_func = &draw_span_RGBA8;
232 enable_perspective();
233 init_span_w_func = &read_perspective_inputs;
234 run_w_func = &run_perspective;
235 skip_w_func = &skip_perspective;
236}
237};
238
239struct composite_FAST_PATH_TEXTURE_RECT_program : ProgramImpl, composite_FAST_PATH_TEXTURE_RECT_frag {
240int get_uniform(const char *name) const override {
241 if (strcmp("sColor0", name) == 0) { return 2; }
242 if (strcmp("uTransform", name) == 0) { return 1; }
243 return -1;
244}
245void bind_attrib(const char* name, int index) override {
246 attrib_locations.bind_loc(name, index);
247}
248int get_attrib(const char* name) const override {
249 return attrib_locations.get_loc(name);
250}
251size_t interpolants_size() const override { return sizeof(InterpOutputs); }
252VertexShaderImpl* get_vertex_shader() override {
253 return this;
254}
255FragmentShaderImpl* get_fragment_shader() override {
256 return this;
257}
258const char* get_name() const override { return "composite_FAST_PATH_TEXTURE_RECT"; }
259static ProgramImpl* loader() { return new composite_FAST_PATH_TEXTURE_RECT_program; }
260};
261