gltrace: Move vertex array count helpers to a different module.

1 files changed, 171 insertions, 0 deletions

diff --git a/wrappers/gltrace_arrays.cpp b/wrappers/gltrace_arrays.cpp
new file mode 100644
index 00000000..b2b1eb38
--- /dev/null
+++ b/wrappers/gltrace_arrays.cpp
@@ -0,0 +1,171 @@
+/**************************************************************************
+ *
+ * Copyright 2010-2016 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include "gltrace_arrays.hpp"
+
+
+GLuint
+_glDrawArrays_count(GLint first, GLsizei count)
+{
+    if (!count) {
+        return 0;
+    }
+    return first + count;
+}
+
+
+GLuint
+_glDrawElementsBaseVertex_count(GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex)
+{
+    GLvoid *temp = 0;
+
+    if (!count) {
+        return 0;
+    }
+
+    GLint element_array_buffer = _element_array_buffer_binding();
+    if (element_array_buffer) {
+        // Read indices from index buffer object
+        GLintptr offset = (GLintptr)indices;
+        GLsizeiptr size = count*_gl_type_size(type);
+        temp = malloc(size);
+        if (!temp) {
+            return 0;
+        }
+        memset(temp, 0, size);
+        _glGetBufferSubData(GL_ELEMENT_ARRAY_BUFFER, offset, size, temp);
+        indices = temp;
+    } else {
+        if (!indices) {
+            return 0;
+        }
+    }
+
+    GLuint maxindex = 0;
+
+    GLboolean restart_enabled = _glIsEnabled(GL_PRIMITIVE_RESTART);
+    while ((_glGetError() == GL_INVALID_ENUM))
+        ;
+
+    GLuint restart_index = 0;
+    if (restart_enabled) {
+        restart_index = (GLuint)_glGetInteger(GL_PRIMITIVE_RESTART_INDEX);
+    }
+
+    GLsizei i;
+    if (type == GL_UNSIGNED_BYTE) {
+        const GLubyte *p = (const GLubyte *)indices;
+        for (i = 0; i < count; ++i) {
+            GLuint index = p[i];
+            if (restart_enabled && index == restart_index) {
+                continue;
+            }
+            if (index > maxindex) {
+                maxindex = index;
+            }
+        }
+    } else if (type == GL_UNSIGNED_SHORT) {
+        const GLushort *p = (const GLushort *)indices;
+        for (i = 0; i < count; ++i) {
+            GLuint index = p[i];
+            if (restart_enabled && index == restart_index) {
+                continue;
+            }
+            if (index > maxindex) {
+                maxindex = index;
+            }
+        }
+    } else if (type == GL_UNSIGNED_INT) {
+        const GLuint *p = (const GLuint *)indices;
+        for (i = 0; i < count; ++i) {
+            GLuint index = p[i];
+            if (restart_enabled && index == restart_index) {
+                continue;
+            }
+            if (index > maxindex) {
+                maxindex = index;
+            }
+        }
+    } else {
+        os::log("apitrace: warning: %s: unknown GLenum 0x%04X\n", __FUNCTION__, type);
+    }
+
+    if (element_array_buffer) {
+        free(temp);
+    }
+
+    maxindex += basevertex;
+
+    return maxindex + 1;
+}
+
+
+GLuint
+_glDrawRangeElementsBaseVertex_count(GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices, GLint basevertex)
+{
+    if (end < start ||
+        count < 0) {
+        return 0;
+    }
+
+    return end + basevertex + 1;
+}
+
+
+GLuint
+_glMultiDrawArrays_count(const GLint *first, const GLsizei *count, GLsizei drawcount)
+{
+    GLuint _count = 0;
+    for (GLsizei draw = 0; draw < drawcount; ++draw) {
+        GLuint _count_draw = _glDrawArrays_count(first[draw], count[draw]);
+        _count = std::max(_count, _count_draw);
+    }
+    return _count;
+}
+
+
+GLuint
+_glMultiDrawElements_count(const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei drawcount)
+{
+    GLuint _count = 0;
+    for (GLsizei draw = 0; draw < drawcount; ++draw) {
+        GLuint _count_draw = _glDrawElements_count(count[draw], type, indices[draw]);
+        _count = std::max(_count, _count_draw);
+    }
+    return _count;
+}
+
+
+GLuint
+_glMultiDrawElementsBaseVertex_count(const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei drawcount, const GLint * basevertex)
+{
+    GLuint _count = 0;
+    for (GLsizei draw = 0; draw < drawcount; ++draw) {
+        GLuint _count_draw = _glDrawElementsBaseVertex_count(count[draw], type, indices[draw], basevertex[draw]);
+        _count = std::max(_count, _count_draw);
+    }
+    return _count;
+}